Components In Passenger Compartment
Components in Passenger Compartment
• The various vents of the instrument panel are described. Refer to => [ Instrument Panel Vents and Air Ducts ] Instrument Panel Vents and Air Ducts.
• The following figures show an instrument panel as installed in a sedan or Avant up to VIN "399999" of model year 2005. The form of the instrument panel in a Cabrio, sedan, or Avant starting with VIN "400000 " of model year 2005 (in the Sedan and Avant) and "012913" of model year 2005 (Cabrio).
1 - Left vent temperature sensor (G150) 1)
• Removing and installing, refer to => [ Left Vent Temperature Sensor ] A/C System Control and Regulation Components.
2 - Diagnostic socket
• Perform A/C system on board diagnostic.
3 - Instrument cluster
• With the instrument cluster control module (J285 ) and outside air temperature display (G106)2)
• The outside air temperature output by the Climatronic control module (J255) A/C control head is displayed for example in vehicles with an automatic transmission only with a gear engaged
• Check the temperature sensor measured values if the temperature display is malfunctioning. Refer to => [ Temperature Sensor Temperature-Dependent Resistance Values ] Climatronic Control Module A/C Control Head Electrical Test
• The measured value of the outside air temperature sensor (G17) is evaluated by the instrument cluster control module (J285) and transmitted via the comfort data bus system to the Climatronic control module (J255) A/C control head. Refer to => Vehicle Diagnosis, Testing and Information System VAS5051 in the "guided fault finding" function
4 - Accelerator mechanism
• The kick-down deactivation of the A/C compressor regulator valve (N280) is performed via the respective engine control module. Refer to => Vehicle Diagnosis, Testing and Information System VAS5051 in the "guided fault finding" function
5 - Left temperature flap motor (V158) 2)
• With left temperature flap potentiometer/actuator (G220) 1)
• Lever color identification: Red (yellow in vehicles with steering on the right)
• Removing and installing, refer to => [ Left Temperature Door Motor ] A/C System Control and Regulation Components
6 - Auxiliary air heater heating element (Z35) 2)
• Not Applicable for USA.
7 - Heat exchanger for heater unit
8 - Left footwell vent temperature sensor (G261) 1)
• Removing and installing, refer to => [ Left Footwell Vent Temperature Sensor ] A/C System Control and Regulation Components
9 - Right footwell vent temperature sensor (G262) 1)
• Removing and installing, refer to => [ Right Footwell Vent Temperature Sensor ] A/C System Control and Regulation Components
10 - A/C control head Climatronic Control Module (J255)
• Different versions
• Removing and installing, refer to => [ Climatronic Control Module A/C Control Head ] A/C System Control and Regulation Components and => [ Climatronic Control Module A/C Control Head ] A/C System Control and Regulation Components
• The interior temperature sensor fan (V42) and the instrument panel interior temperature sensor (G56) are integrated in the Climatronic control module (J255) A/C control head.
• Observe additional notes, refer to => [ Climatronic Control Module A/C Control Head ] A/C System Control and Regulation Components
• Checking and code coding, refer to => [ A/C Control Head Climatronic Control Module, Coding ] A/C Control Head Climatronic Control Module, Coding
• The buttons and display fields are illuminated by light emitting diodes (LED), cannot be replaced
• Depending on the date of manufacture, the A/C control head Climatronic Control Module (J255) has also been designated as A/C Control Head (E87) in various sources of repair information (e.g. in wiring diagrams for vehicles up to model year 2004).
11 - Interior temperature sensor fan (V42) 2)
• Installed in A/C control head Climatronic Control Module (J255), cannot be replaced individually
12 - Instrument panel interior temperature sensor (G56)
• Installed in the Climatronic control module (J255 ) A/C control head, cannot be replaced individually
13 - Defroster vent
• For front windshield
14 - Sunlight photo sensor ( G107) 1)
• Removing and installing, refer to => [ Sunlight Photo Sensor ] A/C System Control and Regulation Components
• Different versions in vehicles up to VIN "399999" of model year 2005 (Sedan and Avant) or "012912" of model year 2005 (Cabrio) and starting with VIN "400000" of model year 2005 (Sedan and Avant) or "012913" of model year 2005 (Cabrio). Observe the exact assignment => [ Sunlight Photo Sensor ] A/C System Control and Regulation Components
15 - Fresh air intake duct temperature sensor (G89) 1)
• Checking, refer to => [ Test Step 2 ] Climatronic Control Module A/C Control Head Electrical Test
• Removing and installing, refer to => [ Fresh Air Intake Duct Temperature Sensor ] A/C System Control and Regulation Components
16 - Recirculation flap motor ( V113) 2)
• With Recirculation Door Motor Position Sensor ( G143)
• Lever color identification: Blue (light blue with additional pins for operating the fresh air flap in vehicles with steering on the right)
• Removing and installing, refer to => [ Recirculation Door Motor ] A/C System Control and Regulation Components
• In vehicles with steering on the right also operates the fresh air flaps (no back pressure flap motor (V71) installed)
17 - Back pressure flap motor ( V71) 2)
• In vehicles with steering on the left, this engine operates the fresh air and back pressure flaps
• Only installed in vehicles with steering on the left
• No back pressure flap is installed in a vehicle with steering on the right. The fresh air flaps are operated by the recirculation flap motor (V113) (no back pressure control is provided).
• With back pressure flap motor position sensor ( G113) 1)
• Color identification of the cam plate: Light blue
• Removing and installing, refer to => [ Defroster Door Motor ] A/C System Control and Regulation Components
18 - Right vent temperature sensor (G151) 1)
• Removing and installing, refer to => [ Right Vent Temperature Sensor ] A/C System Control and Regulation Components.
19 - Fresh air blower control module (J126) and fresh air blower (V2) 2)
• Removing and installing, refer to => [ Fresh Air Blower Control Module and Fresh Air Blower ] A/C System Control and Regulation Components
• The fresh air blower control module (J126) is installed in the fresh air blower (V2) and cannot be replaced separately.
20 - Air guide connection for cooling the glove compartment
• A sealing plug is installed in vehicles without cooling of the glove compartment (figure).
• Components for glove compartment cooling, refer to =>
Interior Moulding / Trim Interior Moulding / Trim
• Removing and installing, refer to => [ Glove Compartment Cooling Duct Connection ] A/C System Control and Regulation Components
21 - Evaporator vent temperature sensor (G263) 1)
• Removing and installing, refer to => [ Evaporator Vent Temperature Sensor ] A/C System Control and Regulation Components
• If the evaporator vent temperature sensor (G263) is not correctly installed in the air flow of the A/C unit, the evaporator can ice up.
22 - Central air flap motor ( V70) 2)
• With central flap motor position sensor (G112) 1)
• Color identification of the cam plate: White (black in vehicles with steering on the right)
• Removing and installing, refer to => [ Central Air Door Motor ] A/C System Control and Regulation Components
23 - Defroster flap motor (V107 ) 2)
• With defroster flap motor position sensor (G135 ) 1)
• Lever color identification: Dark green (light green in vehicles with steering on the right)
• Remove and install, refer to => [ Defroster Door Motor ] A/C System Control and Regulation Components
24 - Right temperature flap motor (V159) 2)
• With right temperature flap potentiometer/actuator (G221) 1)
• Lever color identification: Violet (brown in vehicles with steering on the right)
• Removing and installing, refer to => [ Right Temperature Door Motor ] A/C System Control and Regulation Components
25 - Condensation drain
• Checking, refer to => [ Condensation Drain, Checking ]
• Removing and installing, refer to => [ Condensation Drain ] A/C System Control and Regulation Components
• If the condensation water cannot drain completely, odor problems can occur.
26 - Valve for condensation water drainage
• Checking, refer to => [ Condensation Drain, Checking ]
• Removing and installing, refer to => [ Condensation Drain ] A/C System Control and Regulation Components
27 - A/C unit with evaporator
• Removing and installing, refer to => [ A/C Unit ] A/C Unit
• Disassembling and assembling, refer to => [ A/C Unit ] A/C Unit
• Clean air conditioning system evaporator with Ultrasonic HVAC Cleaning System (VAS 6189). Refer to => [ A/C System Evaporator, Cleaning with VAS 6189 ]
• Must only be removed with refrigerant circuit discharged; deliver vehicle to an A/C system service point workshop