Inside rearview mirror unit, component description - GF68.49-P-2105LE

MODEL 216.3, 221.0/1 as of model year 2009/YoM 08 

Shown on model 221.0 up to 31.8.10 

Location 

The inside rearview mirror unit is located on the front dome in center.

Shown up to 31.8.10 with code (249) Automatically dimming inside and outside rearview mirror (driver) and code (386) Preinstallation for cell phone UPCI system or code (386) Comfort telephony or code (389) Cell phone UPCI system or code (498) Japan version and code (231) Garage door opener or code (232) Garage door opener with frequency 284-390 MHz 

Shown as of 1.9.10 with code (249) Automatically dimming inside and outside rearview mirror (driver) and code (231) Garage door opener or code (232) Garage door opener with frequency 284-390 MHz and code (494) USA version 

Design 

The inside rearview mirror includes the following components:

• Left reading lamp (A67e1)
• Right reading lamp (A67e2)
• Ambient lamp (A67e3)

On model 221 with code (249) Automatically dimming inside and outside rearview mirror (driver) or on model 216:

• Automatic dimming interior rearview mirror sensor, forward (A67h1)
• Automatic dimming interior rearview mirror sensor, back (A67h2)
• Automatic mirror dimming (A67h3)

Up to 31.5.09 with code (386) Preinstallation for cell phone UPCI system or code (386) Comfort telephony or code (389) Cell phone UPCI system or code (498) Japan version or as of 1.6.09:

• Handsfree system microphone group (A67b1)

Additionally with code (231) Garage door opener or code (232) Garage door opener at frequency of 284-390 MHz:

• Garage door opener indicator lamp (A67e4)
• Garage door opener button 1 (A67s1)
• Button 2 garage door opener (A67s2)
• Button 3 garage door opener (A67s3)
• Garage door opener transmitter (A67n2)

In addition as of 1.9.10 with code (494) USA version

• Compass display button (A67s8)
• Compass module with display (A67n3)

Additionally on model 221 with code (337) Taximeter integrated in rearview mirror:

• Taximeter control unit (A67n1)
• Taximeter indicator (A67p1)
• Taximeter push-button 1 (A67s4)
• Taximeter push-button 2 (A67s5)
• Taximeter push-button 3 (A67s6)
• Taximeter push-button 4 (A67s7)

Task 

The inside rearview mirror includes the following functions:

• Voice input for telephone calls and voice control
• Surroundings illumination and reading illumination of interior lighting
• Garage door opener

  (with code (231) Garage door opener or (232) Garage door opener at frequency of 284-390 MHz)

• Mirror dimming

  (on model 221 with code (249) Automatically dimming inside and outside rearview mirror (driver) or on model 216)

• Direction indicator in inside rearview mirror

  (as of 1.9.10 with code (494) USA version)

In addition with code (337) Taximeter in rearview mirror:

• Switching on and off the roof sign lamp (E14/4) (with code (342) Roof sign connection for taxi) (when the roof sign lamp in the IC is activated (A1))
• Data exchange with special vehicle multifunction control unit (SVMCU) (N26/9)
• Storage of trip information in trip memory

  (Storage capacity: information on approx. 800 trips)

• Acquisition of the distance covered via the integrated odometer
• Reading out trip information via a serial data interface

Direction indicator function in inside rearview mirror (as of 1.9.10 with code (494) USA version) 

The compass module senses the terrestrial magnetic field and indicates the direction of travel at intervals of 45°. Possible displays are:

"N", "NW", "W", "SW", "S", "SE", "E" or "NE".

The direction indicator in the inside rearview mirror can be switched on and off with the aid of the compass display button.

The following settings are required to correctly indicate the direction:

• Compass module calibration 
• Setting for magnetic field zone 

Compass module calibration 

The compass module must be calibrated for correct function. For this purpose hold and actuate compass indicator button (t = approx. 4 s) until the system "C" appears in the inside rearview mirror. Then drive the vehicle in circles slowly. If the direction is indicated in the inside rearview mirror, the calibration is completed.

A suitable aid is required to actuate the compass indicator button.

Setting for magnetic field zone 

Since the magnetic field of the earth is subject to fluctuations, the earth globe is subdivided into 15 magnetic field zones to allow exact display of the direction. The magnetic field zone must be adjusted manually.

To adjust the current magnetic field zone press compass display button for t =approx. 2 s until the correct number for the magnetic field zone (1 to 15) is indicated. The desired magnetic field zone can be set by repeatedly pressing the compass display button. After setting the magnetic field zone do not press the compass display button again until the direction is indicated.