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Components Located In Passenger Compartment



Components Located In Passenger Compartment







1. Diagnostic socket
- Perform On Board Diagnostic (OBD) on A/C system Vehicle Diagnosis, Testing and Information System VAS 5051 in "Guided Fault Finding" function.
2. Instrument cluster
- With Outside Air Temperature Display G106
- Ambient temperature sent by Climatronic Control Module J255 is displayed
- Check temperature sensor measured values if temperature display is malfunctioning. Vehicle Diagnosis, Testing and Information System VAS 5051 in "Guided Fault Finding" function.
- Measured value of Outside Air Temperature Sensor G17 is evaluated by Instrument Cluster Control Module and transmitted via CAN-Bus Comfort to Climatronic Control Module J255. Vehicle Diagnosis, Testing and Information System VAS 5051 in "Guided Fault Finding" function.
3. Instrument panel vent with Left Center Air Outlet Sensor G347
- Potentiometer is installed in instrument panel vent.
- Removing and installing instrument panel vent
4. Left Center Vent Motor V110
- With Left Center Vent Motor Position Sensor G136
5. Humidity Sensor G355
- Function of Humidity Sensor G355 is described in relevant self-study program for this vehicle Self Study Program
- Humidity Sensor G355 is installed in area of interior mirror at windshield and connected to Roof Electronics Control Module J528.
- Humidity Sensor G355 determines temperature of windshield by means of infrared signal and humidity level by built-in condenser. Climatronic Control Module J255 uses measuring values to calculate temperature or humidity level at which windows start to fog up and alters setting (vent temperature of air, vent direction of air and air flow rate). Sensor measured values are displayed in measured value block of Climatronic Control Module J255. Vehicle Diagnosis, Testing and Information System VAS 5051 in "Guided Fault Finding" function.
6. Center Outlet Temperature Sensor G191
7. Multi Media Interface (MMI)
- Functions selected (and various additional A/C system functions) on Climatronic Control Module J255 are indicated via MMI display.
- Various additional A/C system functions can be called up and their settings modified via "Set-up" button on Climatronic Control Module J255 Owners Manual.
- Depending on coding and adaptation of front Climatronic Control Module J255, respective setting does not always appear on Multi Media Interface (MMI) display (on vehicles as of model year 2007) when turning rotary temperature control (with USA coding, indication appears e.g. only when rotary temperature control has been briefly pressed beforehand).
8. Sunlight Photo Sensor G107
9. Right Center Vent Motor V111
- With Right Center Vent Motor Position Sensor G137
10. Instrument panel vent with Right Center Air Outlet Sensor G348
- Potentiometer is installed in instrument panel vent
- Removing and installing instrument panel vents
11. Air conditioner unit
- Different versions on vehicles with and without Rear A/C Control Head (Climatronic) E265
- Air guide in air conditioner and in vehicle
- Components of A/C unit in passenger compartment
12. Evaporator drain hose
- Right (front passenger side)
- Checking, removing and installing
13. Climatronic Control Module J255
- Different versions (with or without seat heater, seat heater with or without seat ventilation), allocation Parts Catalog
- Instrument Panel Interior Temperature Sensor G56 is integrated in Climatronic Control Module J255.
- Interior Temperature Sensor Fan V42 is installed in Climatronic Control Module J255, however it cannot be replaced individually.
- Also heed additional notes on A/C control head
- On Board Diagnostic (OBD) of Climatronic Control Module J255 is to be performed as described in Guided Fault Finding Vehicle Diagnosis, Testing and Information System VAS 5051 in "Guided Fault Finding" function.
- Buttons and display fields are illuminated by Light Emitting Diodes (LED), cannot be replaced
- Two rotary buttons are attached, they can be removed and replaced individually Parts Catalog
- Climatronic Control Module J255 with software number "026" installed in model year 2003: With these front A/C control heads Climatronic Control Module J255, settings assigned to a specific person by fingerprint are lost when starting the vehicle via "One touch memory". Service installation of front A/C control heads Climatronic Control Module J255 with this software number is therefore not permitted on vehicles with "One touch memory".
14. Interior Temperature Sensor Fan V42
- Installed in Climatronic Control Module J255
- Removing and installing blower
15. Instrument Panel Interior Temperature Sensor (006785-3211) G56
- Installed in Climatronic Control Module J255, cannot be replaced individually







16. Right Rear Footwell Heater Z43
- Only installed on vehicles with Rear A/C Control Head (Climatronic) E265 (optional equipment)
17. Right Front Seat Temperature Sensor G345 and Right Front Heated Seat Z46
- Seat heater and seat ventilation are not installed in all vehicles (optional equipment)
- Activation of seat heater and seat ventilation are displayed in measured value block of Climatronic Control Module J255, checking Vehicle Diagnosis, Testing and Information System VAS 5051 in "Guided Fault Finding" function.
- Servicing seat heater and seat ventilation
18. Right Rear Warm/Cold Flap Air Outlet Motor V221
- With Right Center Vent Motor Position Sensor G352
- Only installed on vehicles with Rear A/C Control Head (Climatronic) E265 (optional equipment)
- On vehicles without Rear A/C Control Head (Climatronic) E265 (without Right Rear Warm/Cold Flap Air Outlet Motor V221), flaps for right side are moved via a joint shaft by Left Rear Warm/Cold Flap Air Outlet Motor V220.
- Connecting element between flap and motor is "blue" colored
19. Rear A/C Control Head (Climatronic) E265
- Not installed in all vehicles (optional equipment)
- Different versions (with or without rear seat heater, rear seat heater with or without seat ventilation), allocation Parts Catalog
- Also heed additional notes on rear A/C control head
- On Board Diagnostic (OBD) of Rear A/C Control Head (Climatronic) E265 is to be performed as described in Guided Fault Finding Vehicle Diagnosis, Testing and Information System VAS 5051 in "Guided Fault Finding" function.
- Adaptation of Rear A/C Control Head (Climatronic) E265 is checked as described in Guided Fault Finding and altered if necessary Vehicle Diagnosis, Testing and Information System VAS 5051 in "Guided Fault Finding" function.
- Buttons and display fields are illuminated by Light Emitting Diodes (LED), cannot be replaced
- Two rotary buttons are attached, they can be removed and replaced individually Parts Catalog
20. Actuation of rear seat heater and seat ventilation
- Rear seat heater and seat ventilation are not installed in all vehicles (optional equipment)
- On vehicles without Rear A/C Control Head (Climatronic) E265, rear seat heater is actuated via 2 rotary switches
- Measuring values of Left Rear Heated Seat Temperature Sensor G94 and Right Rear Heated Seat Temperature Sensor G95 are displayed in measured value block of Rear A/C Control Head (Climatronic) E265 Vehicle Diagnosis, Testing and Information System VAS 5051 in "Guided Fault Finding" function.
- Actuation of rear seat heater (Left Rear Seat Heating Element Z10 to Right Rear Backrest Heating Element Z13) and seat ventilation is displayed in measured value block of Rear A/C Control Head (Climatronic) E265, checking Vehicle Diagnosis, Testing and Information System VAS 5051 in "Guided Fault Finding" function.
- Servicing rear seat heater and rear seat ventilation
21. Left Rear Footwell Heater Z42
- Only installed on vehicles with Rear A/C Control Head (Climatronic) E265 (optional equipment)
22. Left Front Seat Temperature Sensor G344 and Left Front Heated Seat Z45
- Seat heater and seat ventilation not installed in all vehicles (optional equipment)
- Activation of seat heater and seat ventilation are displayed in measured value block of Climatronic Control Module J255, checking Vehicle Diagnosis, Testing and Information System VAS 5051 in "Guided Fault Finding" function.
- Servicing seat heater and seat ventilation
23. Left Rear Warm/Cold Flap Air Outlet Motor V220
- With Right Center Vent Motor Position Sensor G351
- Only actuates flaps for left side on vehicles with Rear A/C Control Head (Climatronic) E265 (optional equipment)
- Connecting element between flap and motor is "red" colored
- On vehicles without Rear A/C Control Head (Climatronic) E265 (without Right Rear Warm/Cold Flap Air Outlet Motor V221), flaps for right side are also moved via a joint shaft by Left Rear Warm/Cold Flap Air Outlet Motor V220.
24. Right Rear Center Console Temperature Sensor G312
- Only installed on vehicles with Rear A/C Control Head (Climatronic) E265 (optional equipment)
- On vehicles without Right Rear Center Console Temperature Sensor G312, mounting hole is sealed with plug
25. Left Rear Center Console Temperature Sensor G311
- Only installed on vehicles with Rear A/C Control Head (Climatronic) E265 (optional equipment)
- On vehicles without Left Rear Center Console Temperature Sensor G311, mounting hole is sealed with plug
26. Evaporator drain hose
- Left (driver side)
- Checking, removing and installing
27. Accelerator mechanism
- Kick down switch-off of compressor by Climatronic Control Module J255 (via A/C Compressor Regulator Valve N280) is performed by request from Engine Control Module -ECM- (data is exchanged over the CAN-Bus system). Current status can be read out in measured value block of Climatronic Control Module J255 (display group "002"). Vehicle Diagnosis, Testing and Information System VAS 5051 in "Guided Fault Finding" function.
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