Rearview mirror

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Location

The interior rearview mirror unit (A67) is located on the overhead control panel control module (N70) centered at front of the headliner.

W220 interior rearview mirror location.png
  • A67 - Interior rearview mirror unit
  • N70 - Overhead control panel control module

Part numbers

Mirror-related parts in EPC.

There are several versions of W220 rearview mirrors. Left-hand drive vehicles and right-hand drive vehicles have different rearview mirrors. Similarly, there are different versions of rearview mirrors depending on the option codes vehicle is equipped with - garage door opener (option code 231/232), dimming function (option code 249), memory function (option code 275) and telephone or voice control system (option codes 349/359/380/381/382/383/384/385/386/388).

Left-hand drive vehicles

Part No. Notes Front Bottom Top
A2208100217 To Date: 30/09/2003, option 232+249+275, replaced by A2208102817 W220 A2208100217 front.jpg W220 A2208100217 bottom.jpg W220 A2208100217 top.jpg
A2208102817 To Date: 30/09/2003, option 232+249+275 W220 A2208102817 front.jpg W220 A2208102817 bottom.jpg
A2208100517 To Date: 30/09/2003 W220 A2208100517 front.jpg W220 A2208100517 bottom.jpg W220 A2208100517 top.jpg
A2208102617 From Date: 31/10/2002, To Date: 30/09/2003, option 804, From Date: 30/09/2003 not valid for option 383/386/388
A2208100017 To Date: 30/09/2003, option 249 W220 A2208100017 front.jpg W220 A2208100017 bottom.jpg W220 A2208100017 top.jpg
A2208102717 From Date: 30/09/2003, option 349/380/381/382/383/384/385/386/388
A2208101317 From Date: 31/10/2002, To Date: 30/09/2003, option 249+804
A2208104017 From Date: 30/09/2003, option 249
A2208101717 From Date: 31/10/2002, To Date: 30/09/2003, option 232+249+804+[380/381/382/383/384/385] W220 A2208101717 front.jpg W220 A2208101717 bottom.jpg W220 A2208101717 top.jpg
A2208103617 From Date: 30/09/2003, option 232+249+[359/380/381/382/383/384/386/388] W220 A2208103617 front.jpg W220 A2208103617 bottom.jpg W220 A2208103617 top.jpg
A2208100317 To Date: 30/09/2003, Replaced by: A2208101817, option 231+249+[275] W220 A2208100317 front.jpg W220 A2208100317 bottom.jpg W220 A2208100317 top.jpg
A2208101817 To Date: 30/09/2003, 231+249+[275] W220 A2208101817 front.jpg W220 A2208101817 bottom.jpg W220 A2208101817 top.jpg
A2208101517 From Date: 31/10/2002, To Date: 30/09/2003, option 231+249+804
A2208103817 From Date: 30/09/2003, option 231+249
A2208102017 From Date: 31/10/2002, option 249+[349/380/381/382/383/384/386/388] W220 A2208102017 front.jpg W220 A2208102017 bottom.jpg
A2208103517 (not in EPC, but seems to be the successor of A2208102017) W220 A2208103517 front.jpg W220 A2208103517 bottom.jpg
A2208102217 To Date: 30/09/2003, option 231+249+[349/380/381/382/383/385]+804
A2208103317 From Date: 30/09/2003, option 231+249+[380/381/382/383/386/388] W220 A2208103317 front.jpg W220 A2208103317 bottom.jpg W220 A2208103317 top.jpg

Right-hand drive vehicles (UK)

Part No. Notes
A2208100117 option 275
A2208101417 From Date: 31/10/2002, To Date: 30/09/2003, option 249+804
A2208103917 From Date: 30/09/2003, option 249
A2208100417 To Date: 30/09/2003, Replaced by: A2208101917, option 231+275
A2208101917 To Date: 30/09/2003, Replaced by: A2208101917, option 231+275
A2208101617 From Date: 31/10/2002, To Date: 30/09/2003, option 231+249+804
A2208103717 From Date: 30/09/2003, option 231+249
A2208102117 From Date: 31/10/2002, To Date: 30/09/2003, option 249+[349/380/381/382/383]+804
A2208103417 From Date: 30/09/2003, option 249+[380/381/382/383/386/388]
A2208102317 To Date: 30/09/2003, option 231+249+[349/380/381/382/383]+804
A2208103217 From Date: 30/09/2003, option 231+249+[380/381/382/383/386/388]

Design

  • A67 - Inside rearview mirror
  • A67e1 - Left reading lamp
  • A67e2 - Right reading lamp
  • A67e3 - Ambient light
  • A67h1 - Automatic dimming mirror forward sensor
  • A67h2 - Automatic dimming mirror backward sensor
  • A67m1 - Vertical adjustment motor
  • A67m2 - Horizontal adjustment motor
  • A67r1 - Vertical position potentiometer
  • A67r2 - Horizontal position potentiometer
W220 Inside rearview mirror design.jpg

Tasks:

  • The inside rearview mirror (A67) can be adjusted manually.
  • Depending on the equipment (see below), the manually adjusted mirror position can be stored, called up later with the memory function and actuated automatically.
  • The mirror lens of the inside rearview mirror (A67) can be electro-chromatically dimmed. Dimming is accomplished according to the variables measured by the mirror dimming forward sensor (A67h1) and mirror dimming backward sensor (A67h2).
  • The left reading lamp (A67e1) and right reading lamp (A67e2) as well as the ambient light (A67e3) are also integrated in the mirror housing.

Wiring diagram

Rearview mirror is connected to the overhead control panel control module (N70).

Rearview mirror connector (A0005459103).

Ambient/vanity lamp

The ambient lamp (A67e3) is a bright LED (powered by 12 volts) located in the interior rear view mirror (A67). It serves for illumination of the center console.

The ambient lamp is switched on automatically when C.15r is switched on and switched off automatically when C.15r is switched off (i.e., the ambient lamp is on when the ignition is on).

The ambient lamp (A67e3) is controlled directly by the overhead control panel control module (N70). The overhead control panel control module (N70) receives the information "Status c.15r" for this purpose via the CAN bus from the electronic ignition/starter switch control module (N73).

The ambient lamp is independent of the automatic light switch daylight sensor (B32/1) and the position of the door contact ON and OFF switch (N70s3).

Ambient light LED.
Ambient light LED on.

Note: in case ambient light LED is borne out, the error code is not registered.

Reading lamps

The left reading lamp (A67e1) and right reading lamp (A67e2) are integrated in the mirror housing. The bulb used is 12V/6W (A0025443894).

For some rearview mirrors the reading lamp cover is attached to the lamp housing, while for others the cover is attached to mirror housing (see below).

Reading lamp with lamp cover removed (type A).
Reading lamp with lamp cover removed (type B).
Original 6W T10 Wedge bulb and LED upgrade.
Error Code Description
B1022 Component A67e2 (Right reading lamp) has Short circuit or Idle speed.
B1023 Component A67e1 (Left reading lamp) has Short circuit or Idle speed.

Automatic dimming function

For vehicles with option code 249 - INSIDE AND OUTSIDE MIRROR AUTOMATIC DIMMING the interior rearview mirror unit (A67) can be dimmed electro-chromatically. For this purpose, a layer of electrolyte gel is located in the mirror glass between the reflector and the cover lens. Voltage connected to the gel modifies its permeability to light. The light reaching the surface of the mirror is reflected to a greater or lesser extent due to the magnitude of the actuating voltage. The actuating voltage is controlled by the electronic circuitry in the interior rearview mirror. This procedure is subject to the ambient light and the light reaching the mirror.

These two input variables are sensed by the ambient light sensor (A67h2) in the mirror housing (rear side) and the automatic dimming interior rearview mirror sensor (A67h1) in the mirror glass of the interior rearview mirror unit (A67).

Ambient light forward sensor (A67h1).
Ambient light backward sensor (A67h2).

If an interior light is switched on or the reverse gear (CAN message) is engaged, the interior rearview mirror is always switched to a brighter setting. This is accomplished by an additional signal lead from the overhead control panel control module (N70) to the interior rearview mirror unit (A67).

Function prerequisites:

  • Voltage not too low or too high
  • C.15R or C.15 ON

The interior rearview mirror unit (A67) serves also as master for the automatic dimming exterior rearview mirror (driver's side).

Memory feature

For vehicles with option code 275 - MEMORY PACKAGE (DRIVER SEAT, STRG. COL., MIRROR) the inside rearview mirror (A67) can be adjusted automatically with the memory function, i.e. stored mirror position can be called up. For this purpose, two DC motors, a vertical adjustment motor (A67m1) and a horizontal adjustment motor (A67m2) are present in the housing actuated by the overhead control panel control module (N70). The vertical position potentiometer (A67r1) and horizontal position potentiometer (A67r2) are located next to the motors for position recognition.

Note: As of chassis 392659 (10/2003) the inside rearview mirror memory function is no longer part of the memory package (seat adjustment, steering wheel height adjustment and outside mirror adjustment). The memory feature for the electrical inside rearview mirror can no longer be ordered and is no longer installed in the series production of the models specified above.

This is the reason why vehicles produced after 10/2003 may have this error code present:

Error Code Description
B10B4 Component A67r1 (Vertical position potentiometer) has Open circuit or Short circuit to ground. This fault can be ignored as of manufacture year 10.2003.
B10B6 Component A67r2 (Horizontal position potentiometer) has Open circuit or Short circuit to ground. This fault can be ignored as of manufacture year 10.2003.

Hands-free system microphone group

A67b1 - Hands-free system microphone group

On vehicles as of 01/09/2003 with telephone or with telephone and voice control system (VCS), a hands-free system microphone group (A67b1) is integrated in the inside rearview mirror (A67). The following functions can be performed via the hands-free system microphone group (A67b1):

  • Voice input for making telephone calls using the hands-free system
  • Voice input for voice control system (VCS) (interactive dialog with VCS)

The signals are transmitted to the hands-free system control module (A35/1) or the voice control module (A35/11) via the hands-free system microphone group (A67b1).

Microphone group (A67b1) in the mirror casing.
A2118200435 microphone group module (top).
A2118200435 microphone group module (bottom).
A2118200435 microphone group module (dissected).
A2118200435 microphone group module (dissected).
Usual mirror casing (top) and casing with microphone group embedded (bottom).
A0015403281 connector connecting to the voice control module extension wire.
6-PIN connector connecting to the microphone group module A2118200435.
Usual sensor lens (25.5mm) and sensor lens for casing with microphone group embedded (38mm).

The casing for rearview mirror with embedded microphone group is bigger in volume than the usual mirror casing (see the picture above). The microphone group module has a separate 6-wire cable that connects to voice control module extension wire that is centered under the headliner.

Garage door opener

Vehicles with option code 231 - GARAGE DOOR OPENER or 232 - GARAGE DOOR OPENER WITH 284 - 390 MHZ FREQUENCY have garage door opener buttons integrated in the rearview mirror.

Garage door opener mirror.jpg
  • 1 - Garage door opener buttons 1 (A67s1), 2 (A67s2), 3 (A67s3)
  • 2 - Inside rearview mirror unit (A67)
  • 3 - Garage door opener indicator lamp (A67e4)

Garage door opener, function

The garage door opener consists of an adaptive radio remote control with three transmit buttons. With these three buttons: Button 1 garage door opener (A67s1), button 2 garage door opener (A67s2) or button 3 garage door opener (A67s3) it is possible to activate various receivers for the opening and closing system of the doors and gates.

Program remote control

How to Program Garage Door Opener.

Function requirements:

  • Circuit 15R or circuit 15 ON
  • Press and hold down button 1 garage door opener (A67s1), button 2 garage door opener (A67s2) or button 3 garage door opener (A67s3).
  • The garage door opener indicator lamp (A67e4) starts flashing (1 Hz frequency).
  • Continue to hold button 1 garage door opener (A67s1), button 2 garage door opener (A67s2) or button 3 garage door opener (A67s3)and hold garage door opener remote control with transmit button pressed for t < 90 s. After successful programming the garage door opener indicator lamp (A67e4) flashes rapidly (f = 5.5 Hz) for a duration of approx. 10 s.
  • Release the two transmit buttons and program additional transmitters as required.

In order to save the vehicle battery, the transmitter switches off automatically in the learn-in mode, if programming is not accomplished after approx. 100 seconds.

Transmitter mode

If button 1 garage door opener (A67s1), button 2 garage door opener (A67s2) or button 3 garage door opener (A67s3) is actuated, the signal learned in for this memory space is transmitted activating the associated garage door drive.

The garage door opener signal has a range of at least 15 m.

The transmitter buttons (1) as well as the transmitter for opening the garage door are integrated into the inside rearview mirror (2).

Erasing

  • C. 15 R or c. 15 ON.
  • Press button 1 of garage door opener (A67s1) and button 3 of garage door opener (A67s3) simultaneously for approx. 20 s. The garage door opener indicator lamp (A67e4) starts flashing.
  • Release button 1 on garage door opener (A67s1) and button 3 on garage door opener (A67s3) when garage door opener indicator lamp (A67e4) is flashing within 10 s after it starts flashing. The existing data of the memory locations is erased.

The memories are erased by actuating the button 1 garage door opener (A67s1) and button 3 garage door opener (A67s3) for longer than 20 ms. Successful erasure of all memory locations is indicated for approx. 10 s by the LED flashing rapidly.

Removing inside rearview mirror

Rearview mirror is attached to the sealing using a spring mechanism. Hence the mirror can be detached and reattached simply by force. Mirror retaining plate (A2208100111) is attached to roof frame using three screws (N007981003279).

Rearview mirror retaining spring.
Mirror retaining plate A2208100111.
W220 removing rearview mirror 1.jpg W220 removing rearview mirror 2.jpg
  • 1 - Inside rearview mirror
  • 2 - Paneling
  • 3 - Paneling
  • 4 - Retaining plate
  1. Remove overhead control panel control module with front dome lamp
  2. Unclip paneling (2) on inside rearview mirror
  3. Remove paneling (3)
  4. Remove inside rearview mirror (1) by inserting screwdriver between inside rearview mirror (1) and retaining plate (4) and prying out inside rearview mirror
  5. Install in opposite order

Rain sensor cover

Rain sensor cover Part no. A2208110007 is universal for all types of rear view mirrors. The only difference is in color. Facelift models use different tone of gray - alpaca gray.

Rain sensor cover in origon gray (pre-facelift) front.
Rain sensor cover in origon gray (pre-facelift) back.
Rain sensor cover in alpaca gray (facelift) front.
Rain sensor cover in alpaca gray (facelift) back.

Mirror cover

Part No. Notes Front Back
A2208110171 W220 A2208110171 front.jpg W220 A2208110171 back.jpg
A2208100764 option 278/316/317/329/852/853/854 W220 A2208100764 front.jpg W220 A2208100764 back.jpg
A2208100464 Left-hand drive, option 347/349/855/930 W220 A2208100464 front.jpg W220 A2208100464 back.jpg
A2208101564 Left-hand drive, option 349+804,383+804,384+804,359,383,384 W220 A2208101564 front.jpg W220 A2208101564 back.jpg
A2208100564 Right-hand drive, option 349/855
A2208101664 Right-hand drive, option 349+804,383+804,383,349
Distress call switch (A2208200010).
Microphone for hands-free system (A2208201735).

Disassembling A2208100017

Parts of rearview mirror A2208100017 (dimming function + memory function).

A2208100017 inside front cover.jpg
A2208100017 inside cover.jpg
A2208100017 inside part.jpg
A2208100017 inside board.jpg
A2208100017 inside board zoom.jpg
A2208100017 inside board mirror.jpg
A2208100017 adjustment mechanism.jpg
A2208100017 inside mirror.jpg

Disassembling A2208103517

Parts of rearview mirror A2208103517 (dimming function + microphone group).

A2208103517 inside front cover.jpg
A2208103517 inside cover.jpg
A2208103517 inside part.jpg
A2208103517 inside board.jpg
A2208103517 inside mirror.jpg
A2208103517 inside board plate.jpg
A2208103517 inside board front.jpg
A2208103517 inside board back.jpg
A2208103517 adjustment mechanism.jpg
A2208103517 adjustment mechanism back.jpg

Rearview mirror with memory function and microphone group

There are no rearview mirrors that have both, the memory function and microphone group embedded (the reason could be that memory function was discontinued at 10/2003, before the microphone group in mirror was introduced). However, it is possible to construct one from two mirrors by joining mirror cover that has microphone group embedded to mirror that has memory function. The only challenge is to pull the microphone group wire through the mirror holder. To do that, the wire connector has to be detached from the wire (see below).

Microphone group wire with connector detached.
Microphone group wire pulled through.
A2208100017 front with A2208103517 back.
Rearview mirror with mirror and microphone group.