WIS 91.16 Head-rest/Restraint - Revision history

Ricebubbles: /* DIY Remove Mechanism - Rear Head-rest/Restraint */ Added more detail for removing rear head rest and rearranged for better clarity

2018-08-21T02:18:04Z

DIY Remove Mechanism - Rear Head-rest/Restraint: Added more detail for removing rear head rest and rearranged for better clarity

Show changes

Ricebubbles: /* DIY Remove Mechanism - Rear Head-rest/Restraint */ added easier method for removing RR Head Restraint Mechanism.

2018-08-19T03:33:56Z

DIY Remove Mechanism - Rear Head-rest/Restraint: added easier method for removing RR Head Restraint Mechanism.

← Older revision		Revision as of 03:33, 19 August 2018
Line 130:		Line 130:

	'''12. Remove Rear Right Head-rest/Restraint Actuator'''		'''12. Remove Rear Right Head-rest/Restraint Actuator'''
	After removing the seats the Rear Right Head-rest/Restraint Mechanism is still not accessible until the rear window shelf is either removed or blocked up out of the way.		Later note: It is not necessary to remove the C-Pillar Trim or even block the Rear Window Shelf up out of the way as per paragraphs 12a, 13 and 14 following. The two screws adjacent to the child seat restraint mounting point can be removed through the hole above the child seat mounting point.

			'''12a. If the tip in paragraph 12 doesn't work the use these steps.''' After removing the seats the Rear Right Head-rest/Restraint Mechanism is still not accessible until the rear window shelf is either removed or blocked up out of the way.
	[[File:Rear Right Head-rest Restraint Mechanism.jpg\|400px\|center]]		[[File:Rear Right Head-rest Restraint Mechanism.jpg\|400px\|center]]

Ricebubbles: /* Function - Rear Head-rest/Restraint */ Added Closeup of Rear Head-rest/Restraint Bladder

2016-02-04T10:35:32Z

Function - Rear Head-rest/Restraint: Added Closeup of Rear Head-rest/Restraint Bladder

← Older revision		Revision as of 10:35, 4 February 2016
Line 22:		Line 22:
	The rear head-rests/restraints automatically move into the up position whenever anyone sits in a rear seat and fastens their seat belt. All three head-rests may be lowered by momentarily pressing the button on the dash. Holding this button pressed will also raise the two outer head-rests. The centre head-rest must be raised manually.		The rear head-rests/restraints automatically move into the up position whenever anyone sits in a rear seat and fastens their seat belt. All three head-rests may be lowered by momentarily pressing the button on the dash. Holding this button pressed will also raise the two outer head-rests. The centre head-rest must be raised manually.
	* When the head rest button on the dash is pressed for greater than 2-3 seconds, the PSE Pump provides positive air pressure to the Rear Head-rest/Restraint Actuators and an electrical signal is provided for a few seconds to the valve inside the Rear Head-rest/Restraint Actuators. The positive pressure pushes the piston inside the actuators to the fully extended position. While the valve is actuated, the positive pressure is transferred through the actuators to Air Bladders in each unit which causes the Head-rest/Restraints to fully raise and lock into position.		* When the head rest button on the dash is pressed for greater than 2-3 seconds, the PSE Pump provides positive air pressure to the Rear Head-rest/Restraint Actuators and an electrical signal is provided for a few seconds to the valve inside the Rear Head-rest/Restraint Actuators. The positive pressure pushes the piston inside the actuators to the fully extended position. While the valve is actuated, the positive pressure is transferred through the actuators to Air Bladders in each unit which causes the Head-rest/Restraints to fully raise and lock into position.

			The Air Bladder is a clever device in the shape of a butterfly and when inflated applies torque to the head-rest axle and slowly and quietly raises the head-rest. In the fully raised position a spring loaded mechanism locks the head-rest/restraint into position.
			'''Closeup of Rear Head-rest/Restraint Bladder'''
			[[File:Closeup of Rear Head-rest Restraint Bladder.jpg\|300px\|center]]

			Once fully raised and the head-rest/restraint is locked into position, it cannot be lowered manually. To lower each or all head-rest/restraints requires a momentary press on the dashboard button which sends an electrical signal to the solenoid actuator and the PSE Pump.

	==Part Numbers - Rear Head-rest/Restraint==		==Part Numbers - Rear Head-rest/Restraint==

Ricebubbles: /* Description - Rear Head-rest/Restraint */ Typo

2016-02-04T10:27:40Z

Description - Rear Head-rest/Restraint: Typo

← Older revision		Revision as of 10:27, 4 February 2016
Line 16:		Line 16:
	[[File:Rear Right Head-rest Restraint Actuator as removed.JPG\|500px\|center]]		[[File:Rear Right Head-rest Restraint Actuator as removed.JPG\|500px\|center]]

	'''Rear ~~Right~~ Head-rest Restraint Assembled.'''		'''Rear Left Head-rest Restraint Assembled.'''
	[[File:Rear Right Head-rest Restraint Mechanism and Actuator.jpg\|400px\|center]]		[[File:Rear Right Head-rest Restraint Mechanism and Actuator.jpg\|400px\|center]]

Ricebubbles: /* Description - Rear Head-rest/Restraint */ Improved Description

2016-02-04T10:26:25Z

Description - Rear Head-rest/Restraint: Improved Description

@@ Line 2: / Line 2: @@
 ==Description - Rear Head-rest/Restraint==
 Automatic Rear Head-rest/Restraints are fitted on a 2003 update W220 S500L model with electric rear seats and lumbar adjustment in the back-rest.
 ==Function - Rear Head-rest/Restraint==
 The rear head-rests/restraints automatically move into the up position whenever anyone sits in a rear seat and fastens their seat belt.  All three head-rests may be lowered by momentarily pressing the button on the dash.  Holding this button pressed will also raise the two outer head-rests.  The centre head-rest must be raised manually.

Ricebubbles: Reordered sections.

2016-02-04T10:12:40Z

Reordered sections.

Ricebubbles: /* Function - Head-rest/Restraint */

2016-02-04T09:57:02Z

Function - Head-rest/Restraint

← Older revision		Revision as of 09:57, 4 February 2016
Line 1:		Line 1:
	==Description - Rear Head-rest/Restraint==		==Description - Rear Head-rest/Restraint==
	Automatic Rear Head-rest/Restraints are fitted on a 2003 update W220 S500L model with electric rear seats and lumbar adjustment in the back-rest.		Automatic Rear Head-rest/Restraints are fitted on a 2003 update W220 S500L model with electric rear seats and lumbar adjustment in the back-rest.
	==Function - Head-rest/Restraint==		==Function - Rear Head-rest/Restraint==
	The rear head-rests/restraints automatically move into the up position whenever anyone sits in a rear seat and fastens their seat belt. All three head-rests may be lowered by momentarily pressing the button on the dash. Holding this button pressed will also raise the two outer head-rests. The centre head-rest must be raised manually.		The rear head-rests/restraints automatically move into the up position whenever anyone sits in a rear seat and fastens their seat belt. All three head-rests may be lowered by momentarily pressing the button on the dash. Holding this button pressed will also raise the two outer head-rests. The centre head-rest must be raised manually.
	* When the head rest button on the dash is pressed for greater than 2-3 seconds, the PSE Pump provides positive air pressure to the Rear Head-rest/Restraint Actuators and an electrical signal is provided for a few seconds to the valve inside the Rear Head-rest/Restraint Actuators. The positive pressure pushes the piston inside the actuators to the fully extended position. While the valve is actuated, the positive pressure is transferred through the actuators to Air Bladders in each unit which causes the Head-rest/Restraints to fully raise and lock into position.		* When the head rest button on the dash is pressed for greater than 2-3 seconds, the PSE Pump provides positive air pressure to the Rear Head-rest/Restraint Actuators and an electrical signal is provided for a few seconds to the valve inside the Rear Head-rest/Restraint Actuators. The positive pressure pushes the piston inside the actuators to the fully extended position. While the valve is actuated, the positive pressure is transferred through the actuators to Air Bladders in each unit which causes the Head-rest/Restraints to fully raise and lock into position.

Ricebubbles: /* Function - Head-rest/Restraint */ Added Part Numbers - Rear Head-rest/Restraint

2016-02-04T09:55:31Z

Function - Head-rest/Restraint: Added Part Numbers - Rear Head-rest/Restraint

@@ Line 3: / Line 3: @@
 ==Function - Head-rest/Restraint==
 The rear head-rests/restraints automatically move into the up position whenever anyone sits in a rear seat and fastens their seat belt.  All three head-rests may be lowered by momentarily pressing the button on the dash.  Holding this button pressed will also raise the two outer head-rests.  The centre head-rest must be raised manually.
 ==Issues - Rear Head-rest/Restraint==
 * The head-rests cannot be lowered manually. If they stick in the raised position they can obstruct the view out the rear window.

Ricebubbles: /* Remove Rear Right Head-rest/Restraint Mounting Screws */

2016-02-04T09:45:27Z

Remove Rear Right Head-rest/Restraint Mounting Screws

← Older revision		Revision as of 09:45, 4 February 2016
Line 103:		Line 103:
	This is what it should have looked like.		This is what it should have looked like.
	[[File:Rear Right Head-rest Restraint Mechanism and Actuator.jpg\|400px\|center]]		[[File:Rear Right Head-rest Restraint Mechanism and Actuator.jpg\|400px\|center]]

			===Reinstall Rear Head-rest/Restraint Actuator===
			Reinstallation is just a matter of reversing the dismantling procedure. It is a good idea to use some dielectric grease (also used on spark plug wires) to lubricate the pneumatic lines before reconnecting them.

			When remounting the rear head-rest/restraint actuator make sure that the slotted lever arm on the piston engages the pin on the head-rest mechanism.

	==DIY Repair Mechanism - Rear Head-rest/Restraint==		==DIY Repair Mechanism - Rear Head-rest/Restraint==

Ricebubbles: /* Issues - Rear Head-rest/Restraint */ fixed typo.

2016-02-04T09:37:36Z

Issues - Rear Head-rest/Restraint: fixed typo.

← Older revision		Revision as of 09:37, 4 February 2016
Line 6:		Line 6:
	* The head-rests cannot be lowered manually. If they stick in the raised position they can obstruct the view out the rear window.		* The head-rests cannot be lowered manually. If they stick in the raised position they can obstruct the view out the rear window.
	* Some of the procedure for removing the rear Head-rest/Restraint is rather tricky and is not explained in STAR XENTRY WIS. The author wasted a lot of time removing all the boot/trunk lining only to find that it is not possible to access the head-rest/restraint mechanism because of the fuel tank.		* Some of the procedure for removing the rear Head-rest/Restraint is rather tricky and is not explained in STAR XENTRY WIS. The author wasted a lot of time removing all the boot/trunk lining only to find that it is not possible to access the head-rest/restraint mechanism because of the fuel tank.
	* The Rear Head-rest/Restraint solenoid actuator can easily come off the main part of the mechanism thus leaving the ~~ear~~ Head-rest/Restraint in the raised position. The next photo shows a dislodged rear left head rest actuator.		* The Rear Head-rest/Restraint solenoid actuator can easily come off the main part of the mechanism thus leaving the Rear Head-rest/Restraint in the raised position. The next photo shows a dislodged rear left head rest actuator.
	[[File:Faulty Rear Left Head-rest Restraint Actuator.jpg\|center]]		[[File:Faulty Rear Left Head-rest Restraint Actuator.jpg\|center]]
	* The Rear Head-rest/Restraint solenoid actuator often breaks in half as the securing lugs are rather weak.		* The Rear Head-rest/Restraint solenoid actuator often breaks in half as the securing lugs are rather weak.

← Older revision		Revision as of 10:12, 4 February 2016
Line 1:		Line 1:
			=Rear Rear Head-rest/Restraint=
	==Description - Rear Head-rest/Restraint==		==Description - Rear Head-rest/Restraint==
	Automatic Rear Head-rest/Restraints are fitted on a 2003 update W220 S500L model with electric rear seats and lumbar adjustment in the back-rest.		Automatic Rear Head-rest/Restraints are fitted on a 2003 update W220 S500L model with electric rear seats and lumbar adjustment in the back-rest.
Line 31:		Line 32:

	==DIY Remove Mechanism - Rear Head-rest/Restraint==		==DIY Remove Mechanism - Rear Head-rest/Restraint==
	~~===~~Remove Rear Head-Rest/Restraints~~===~~		'''1. Remove Rear Head-Rest/Restraints'''
	The first task is to remove all three rear head-rest/restraints. If they are not already in the raised position, manually raise them.		The first task is to remove all three rear head-rest/restraints. If they are not already in the raised position, manually raise them.

Line 46:		Line 47:
	[[File:Rear Head-rest Restraint Black Plastic Securing Levers.jpg\|400px\|center]]		[[File:Rear Head-rest Restraint Black Plastic Securing Levers.jpg\|400px\|center]]

	~~===~~Remove Rear Seat Squab/Cushion~~===~~		'''2. Remove Rear Seat Squab/Cushion'''
	The second step is to remove the rear seat squab. Move the seat to the maximum forward position and reach underneath. There are two springs (marked 4 in the next Figure) which must be pressed outwards to release the seat.		The second step is to remove the rear seat squab. Move the seat to the maximum forward position and reach underneath. There are two springs (marked 4 in the next Figure) which must be pressed outwards to release the seat.
	[[File:Remove Rear Seat Squab Cushion.jpg\|500px\|center]]		[[File:Remove Rear Seat Squab Cushion.jpg\|500px\|center]]
Line 53:		Line 54:
	[[File:Rear Seat Squab Cushion Frame.jpg\|500px\|center]]		[[File:Rear Seat Squab Cushion Frame.jpg\|500px\|center]]

	~~===~~Remove Two Lower Mounting Bolts for the Rear Seat Back-rest~~===~~		'''3. Remove Two Lower Mounting Bolts for the Rear Seat Back-rest'''
	Once the seat squab/cushion is out of the way it exposes the two lower mounting bolts for the Rear Seat Back-rest. Nickel plated (silver) in the next photo. Remove both of these bolts (10mm Torx).		Once the seat squab/cushion is out of the way it exposes the two lower mounting bolts for the Rear Seat Back-rest. Nickel plated (silver) in the next photo. Remove both of these bolts (10mm Torx).
	[[File:Two Lower Mounting Bolts For The Rear Seat Back-rest.jpg\|500px\|center]]		[[File:Two Lower Mounting Bolts For The Rear Seat Back-rest.jpg\|500px\|center]]

	~~===~~Remove Rear Upper Chrome Kick Plate~~===~~		'''4. Remove Rear Upper Chrome Kick Plate'''
	The upper chrome kick plate can be prised off with plastic or wooden wedges.		The upper chrome kick plate can be prised off with plastic or wooden wedges.
	[[File:Remove Rear Upper Chrome Kick Plate.jpg\|400px\|center]]		[[File:Remove Rear Upper Chrome Kick Plate.jpg\|400px\|center]]

	~~===~~Remove Rear Seat Lumbar Adjustment Control and Trim~~===~~		'''5. Remove Rear Seat Lumbar Adjustment Control and Trim'''
	Next remove the Rear Seat Lumbar Adjustment Control and associated Trim. The control can be prised out with a sharp plastic wedge and the two airlines disconnected.		Next remove the Rear Seat Lumbar Adjustment Control and associated Trim. The control can be prised out with a sharp plastic wedge and the two airlines disconnected.
	[[File:Remove Rear Seat Lumbar Adjustment Control and Trim.jpg\|400px\|center]]		[[File:Remove Rear Seat Lumbar Adjustment Control and Trim.jpg\|400px\|center]]

	~~===~~Remove Trim Between Rear Seat Backrest and Door Frame~~===~~		'''6. Remove Trim Between Rear Seat Backrest and Door Frame'''
	By carefully prising and pulling, the leather trim between the rear seat backrest and the door frame can be removed. This exposes the first of the two upper mounting bolts for the rear seat back-rest. Remove this bolt.		By carefully prising and pulling, the leather trim between the rear seat backrest and the door frame can be removed. This exposes the first of the two upper mounting bolts for the rear seat back-rest. Remove this bolt.
	[[File:First of the Two Upper Mounting Bolts for the Rear Seat Back-rest.jpg\|400px\|center]]		[[File:First of the Two Upper Mounting Bolts for the Rear Seat Back-rest.jpg\|400px\|center]]

	~~===~~Remove Centre Console Upper Back-rest~~===~~		'''7. Remove Centre Console Upper Back-rest'''
	Next remove the Centre Console Upper Back-rest. There are two plastic clips about a third of the way down on both sides. These must be depressed with two fingers to release.		Next remove the Centre Console Upper Back-rest. There are two plastic clips about a third of the way down on both sides. These must be depressed with two fingers to release.
	[[File:Rear View of Plastic Clip on Centre Console Upper Back-rest.jpg\|400px\|center]]		[[File:Rear View of Plastic Clip on Centre Console Upper Back-rest.jpg\|400px\|center]]
	The Centre Console Upper Back-rest can then be pulled out with an upwards movement.		The Centre Console Upper Back-rest can then be pulled out with an upwards movement.

	~~===~~Remove Centre Upper Mounting Bolts~~===~~		'''8. Remove Centre Upper Mounting Bolts'''
	With the Centre Console Upper Back-rest out of the way it exposes the two centre upper mounting bolts for both Left and Right Rear Seat Backs.		With the Centre Console Upper Back-rest out of the way it exposes the two centre upper mounting bolts for both Left and Right Rear Seat Backs.

Line 80:		Line 81:
	[[File:Centre Upper Mounting Bolts for Left and Right Rear Seat Backs.jpg\|400px\|center]]		[[File:Centre Upper Mounting Bolts for Left and Right Rear Seat Backs.jpg\|400px\|center]]

	~~===~~Remove Rear Seat Back-rest~~===~~		'''9. Remove Rear Seat Back-rest'''
	The rear seat back-rest can now be removed with an upwards movement. It easily clears the raised head-rest which could not be lowered. The first time I did this repair I left the left head-rest in place. The second time, two years later, I had to remove all three head-rests so that I could raise the rear window shelf to remove the right head-rest mechanism.		The rear seat back-rest can now be removed with an upwards movement. It easily clears the raised head-rest which could not be lowered. The first time I did this repair I left the left head-rest in place. The second time, two years later, I had to remove all three head-rests so that I could raise the rear window shelf to remove the right head-rest mechanism.
	[[File:Rear Seat Back-rest Removed.jpg\|400px\|center]]		[[File:Rear Seat Back-rest Removed.jpg\|400px\|center]]

	~~===~~Lower the Plastic Lining~~===~~		'''10. Lower the Plastic Lining'''
	When the corner of the plastic lining is lowered it reveals the Rear Head-rest/Restraint Actuator.		When the corner of the plastic lining is lowered it reveals the Rear Head-rest/Restraint Actuator.

Line 90:		Line 91:
	[[File:Faulty Rear Left Head-rest Restraint Actuator.jpg\|400px\|center]]		[[File:Faulty Rear Left Head-rest Restraint Actuator.jpg\|400px\|center]]

	~~===~~Remove Rear Left Head-rest/Restraint Actuator~~===~~		'''11. Remove Rear Left Head-rest/Restraint Actuator'''
	The Rear Left Head-rest/Restraint Actuator can be removed by disconnecting the two air lines and the electrical connector.		The Rear Left Head-rest/Restraint Actuator can be removed by disconnecting the two air lines and the electrical connector.

Line 105:		Line 106:
	Often you will find that several plastic lugs holding the actuator together have broken and allowed the actuator to leak slightly as well as become dislodged.		Often you will find that several plastic lugs holding the actuator together have broken and allowed the actuator to leak slightly as well as become dislodged.

	~~===~~Remove Rear Right Head-rest/Restraint Actuator~~===~~		'''12. Remove Rear Right Head-rest/Restraint Actuator'''
	After removing the seats the Rear Right Head-rest/Restraint Mechanism is still not accessible until the rear window shelf is either removed or blocked up out of the way.		After removing the seats the Rear Right Head-rest/Restraint Mechanism is still not accessible until the rear window shelf is either removed or blocked up out of the way.
	[[File:Rear Right Head-rest Restraint Mechanism.jpg\|400px\|center]]		[[File:Rear Right Head-rest Restraint Mechanism.jpg\|400px\|center]]

	~~===~~Remove the C-Pillar trim on both sides~~===~~		'''13. Remove the C-Pillar trim on both sides'''

	~~===~~Block the Rear Window Shelf up out of the way~~===~~		'''14. Block the Rear Window Shelf up out of the way'''
	[[File:Rear Window Shelf blocked up out of the way.jpg\|400px\|center]]		[[File:Rear Window Shelf blocked up out of the way.jpg\|400px\|center]]

	~~===~~Remove Rear Right Head-rest/Restraint Mounting Screws~~===~~		'''15. Remove Rear Right Head-rest/Restraint Mounting Screws'''
	Remove the two rear screws and loosen the two top screws which don’t need to be completely removed.		Remove the two rear screws and loosen the two top screws which don’t need to be completely removed.
	[[File:W220 Position of Torx Bolts for Rear Seat Head Restraint Mechanism.JPG\|400px\|center]]		[[File:W220 Position of Torx Bolts for Rear Seat Head Restraint Mechanism.JPG\|400px\|center]]
Line 124:		Line 125:
	[[File:Rear Right Head-rest Restraint Mechanism and Actuator.jpg\|400px\|center]]		[[File:Rear Right Head-rest Restraint Mechanism and Actuator.jpg\|400px\|center]]

	~~===~~Reinstall Rear Head-rest/Restraint Actuator~~===~~		'''16. Reinstall Rear Head-rest/Restraint Actuator'''
	Reinstallation is just a matter of reversing the dismantling procedure. It is a good idea to use some dielectric grease (also used on spark plug wires) to lubricate the pneumatic lines before reconnecting them.		Reinstallation is just a matter of reversing the dismantling procedure. It is a good idea to use some dielectric grease (also used on spark plug wires) to lubricate the pneumatic lines before reconnecting them.

Line 135:		Line 136:
	[[File:Rear Head-rest Restraint Actuator Showing Reinforcing Wire.JPG\|500px\|center]]		[[File:Rear Head-rest Restraint Actuator Showing Reinforcing Wire.JPG\|500px\|center]]

			=Head Rest/Restraint Button=
			==Issues - Head Rest/Restraint Button==
			The buttons on the doors which control the Head Rest/Restraints are easily dislodged and lost. New or second hand buttons are not available and the whole EAS (Electrically Adjusted Seat) module is approximately $250. However it is an easy project to manufacture a new one.

	==DIY Repair/Replace/Manufacture - Head Restraint Button==		==DIY Repair/Replace/Manufacture - Head Rest/Restraint Button==

	Version 01 posted 2012-01-25 Post #5 at:		Version 01 posted 2012-01-25 Post #5 at:

	http://www.benzworld.org/forums/w220-s-class/1624796-seeking-rh-headrest-adjuster-button.html		http://www.benzworld.org/forums/w220-s-class/1624796-seeking-rh-headrest-adjuster-button.html