Doors

Handles

Parts

Door handle (left) A2207601170 9999 (colorless - requires painting).

Door handle left (KEYLESS-GO) prepared for repainting.

Part No.	Notes
A2207601170	Left (front/rear)
A2207601270	Right (front/rear)
A2207601370	Left (front/rear). For vehicles with option code 889 (KEYLESS-GO).
A2207601470	Right (front/rear). For vehicles with option code 889 (KEYLESS-GO).

KEYLESS-GO

Wiring

KEYLESS-GO handles have wiring with 4-pin connector.

KEYLESS-GO door handle connector (door side)

KEYLESS-GO door handle connector (handle side)

KEYLESS-GO door handle connector pins (handle side)

• Pin 1 - white wire
• Pin 2 - red wire
• Pin 3 - blue wire
• Pin 4 - yellow wire

The white and red wires (pin 1 and 2) are used for capacitive sensor that signals when a hand is inserted into a door handle. The blue and yellow wires (pin 3 and 4) close circuit when the KEYLESS-GO button is pressed on a door handle.

W215 vehicles have exactly the same door handles with the only difference that KEYLESS-GO handle has the opposite connector (male instead of female) .

W215 vs W220 left door handle (note the opposite connectors).

Button

It is common that by age the KEYLESS-GO button starts malfunction or fails completely.

The correct working of KEYLESS-GO button (microswitch) can be tested by measuring the resistance between connector pins 3 and 4. When the microswitch is not pressed the resistance must be infinite. When pressed the circuit is closed resulting in < 500 Ohm resistance measurement.

Testing KEYLESS-GO button using multimeter

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Button rubber

After years of wear the rubber on KEYLESS-GO button develops cracks and allows water to get in. The moisture in turn can lead to the damage of the button microswitch.

Aftermarket replacement rubber buttons can be bought on ebay for EUR 40 per pair. The residues of the old rubber have to be removed and the new button glued on.

Link to UK seller where you can buy 4 rubber buttons for about 29 EUR https://x8r.co.uk/mercedes.html.

PDF instruction how to change the rubber button https://www.x8r.co.uk/over/buttonsmallover/Mercedes-Benz-Keyless-Go-Entry-Door-Exterior-Handle-replacement-button-square-rubber-repair-fix-instructions-repair-video.pdf

YouTube video instruction how to change the rubber button

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If the KEYLESS-GO microswitch is also damaged, the easiest solution is to buy a used handle and repaint it.

Damaged KEYLESS-GO rubber button.

KEYLESS-GO rubber buttons (front).

KEYLESS-GO rubber buttons (back).

Capacitive sensor

It is common that by age the KEYLESS-GO capacitive sensor inside a handle starts to malfunction or fails completely.

The inside of a KEYLESS-GO door handle contains a circuit board. The space inside the handle is filled with epoxy. The microswitch of KEYLESS-GO button seems to be connected using a type of thin ribbon cable.

Inside KEYLESS-GO handle monolith (wiring).

Inside KEYLESS-GO handle monolith (button).

Chrome

With time the chrome layer of door handle develops bubbles and starts to peal off.

The chrome part is not sold separately, but can be replaced from another handle.

The chrome on KEYLESS-GO door handles can be easily removed by unscrewing two screws.

The chrome on the door handle without KEYLESS-GO button can be pulled off by carefully prying it off from the inner side of the door handle.

Chrome layer peals off from the door handle.

KEYLESS-GO (top) and standard (bottom) chrome.

KEYLESS-GO (top) and standard (bottom) chrome.

Driver's door lock

Driver's door handle lock (dissected)

Door pillar panel covers

Part No.	Notes
A2206900787 (~ EUR 50)	Front left
A2206900887 (~ EUR 50)	Front right
A2206901187 (~ EUR 50)	Rear left
A2206901287 (~ EUR 50)	Rear right

The covers are held in place by an extremely strong tape that is already on the replacement parts. One must thoroughly clean the old tape residue off, or it will interfere with a proper mount - it can hold the new part too far out. Care must be exercised in positioning the new parts.

Rust on B pillar cover.

Removal of B pillar cover.

Rear right cover trim.

There are aftermarket carbon covers available on ebay, however, these covers come without plastic top ending.

Inner door handle illumination

Inner door illumination is done by a LED module that is installed in door lining. The LED module contains a small bulb while the light is directed to door handle over on optical wire.

LED module installed

LED module

LED module opened

Door Handle Latch Mechanism

Issues

• Inner handle is too loose and will not pull the latch mechanism far enough forward to release the latch.
• There is no tension adjustment for the cable.
• The cable slips out of the guide very easily as you move the inner door cover away from the door.
• A common fault is improper positioning of the cable in the inner handle mechanism.

Solution

At the back of the door handle mechanism there is a "Guide" - the inner part of the cable must be threaded into the guide (1 in the photo), and the cable jacket fitted into a small receptacle (at 2).

Door handle latch mechanism.

With that done, the cable is positioned properly, the tension is correct, the door handle operates the latch, and springs back to the proper position when released.