Under Hood ACC Drain Access and Cleaning: Difference between revisions

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'''Under Hood/Bonnet ACC Drain Access and Cleaning'''
Back to: [[WIS 83.40 Automatic Climate Control (ACC) or Heating Ventilation and Air Conditioning (HVAC)]]
Reference: BenzWorld Member, Les Smith, who checked the air intake under the bonnet. The drain was blocked and it
==Location - Under Hood/Bonnet ACC Drain Access and Cleaning==
  was full of water. This may have contributed to the corrosion and eventual seizing of his blower motor.
'''LHD Vehicle'''
[[File:W220_ACC_Under_Hood_Drain_Access.JPG|300px|center]]


BenzWorld Member TuneTime says: open the hood. Look on the passenger side under the wiper. There is a large duct
  with a grill on it. See the dirty hole in the bottom outer side all the way on the bottom.
That hole gets clogged and the area fills to a point to which it spills over inside itself and enters the cabin.
  So a visual inspection is usually fine, unless there is stuff in there. Then an air gun or a long screwdriver
  to push the crap through is the way to go.


BenzWorld Member Adrian Mac says The lowest outside part of the car between the front and back wheel is a plastic
==DIY Procedure - Under Hood/Bonnet ACC Drain Access and Cleaning==
  colour-coded sill cover. At each end of this are two drain holes, about 3mm in diameter and angled back towards
* Open the hood.
  the rear of the car. I shoved a wooden kebab skewer up each one and found the front offside one blocked.
* Look on the passenger side under the wiper.
Inside the front wheel arch, near the bottom, there's a 10mm bolt attaching the front end of the sill cover.  
* Inspect the large duct with a grill on it.
  If you undo this then the sill is just held on with a number of black plastic push-fit gromit like things
  (the ones where the centre of them moves independently of the outside). Pull these off (by pulling out the middle
  core first) and the plastic sill cover comes away. That's where I found two cup fulls of mud and dirt, blocking the drain.


'''Under Hood/Bonnet ACC Drain Access:'''
[[File:W220_ACC_Under_Hood_Drain_Access_Close_Up.JPG|300px|center]]
http://w220.ee/images/6/6d/W220_ACC_Under_Hood_Drain_Access.JPG
http://w220.ee/images/9/95/W220_ACC_Under_Hood_Drain_Access_Close_Up.JPG


'''Under Hood/Bonnet ACC Drain Hole Location:'''
* Look carefully at the hole in the bottom outer side. It is usually clogged and the area fills with water to a point where it spills over inside itself and enters the cabin.
http://w220.ee/images/6/6e/W220_ACC_Under_Hood_Drain_Hole_Close_Up.JPG
[[File:W220_ACC_Under_Hood_Drain_Hole_Close_Up.JPG|300px|center]]
 
* A visual inspection is usually fine, unless there is stuff in there.
* Use an air gun or a long screwdriver to clear the crap.
* The grill will easily unclip to gain better access for clearing the drain hole.
 
Acknowledgement: BenzWorld Members, Les Smith and TuneTime.

Latest revision as of 01:37, 18 March 2015

Back to: WIS 83.40 Automatic Climate Control (ACC) or Heating Ventilation and Air Conditioning (HVAC)

Location - Under Hood/Bonnet ACC Drain Access and Cleaning

LHD Vehicle


DIY Procedure - Under Hood/Bonnet ACC Drain Access and Cleaning

  • Open the hood.
  • Look on the passenger side under the wiper.
  • Inspect the large duct with a grill on it.
  • Look carefully at the hole in the bottom outer side. It is usually clogged and the area fills with water to a point where it spills over inside itself and enters the cabin.
  • A visual inspection is usually fine, unless there is stuff in there.
  • Use an air gun or a long screwdriver to clear the crap.
  • The grill will easily unclip to gain better access for clearing the drain hole.

Acknowledgement: BenzWorld Members, Les Smith and TuneTime.

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