A1
| Components not located in passenger compartment |
| Component group „1“ |
| 1 - | Receiver |
| q | Integrated into condenser |
| q | Exploded view → Chapter |
| 2 - | Condenser |
| q | Only to be removed after draining refrigerant circuit → Air conditioner with refrigerant R134a |
| q | Exploded view → Chapter |
| 3 - | Air conditioner compressor regulating valve -N280- |
| q | Fitted in air conditioner compressor |
| q | Checking cut-in signal → Chapter |
| 4 - | Air conditioner compressor |
| q | Different versions → Electronic parts catalogue |
| q | Removing and installing → Chapter |
| q | Detaching and attaching refrigerant line at air conditioner compressor → Chapter |
| q | Renewing pulley → Chapter |
| 5 - | Label |
| q | Indicates type of refrigerant and specified capacity |
| q | For refrigerant R134a capacity and notes on refrigerant, refer to → Air conditioner with refrigerant R134a |
| 6 - | Right water drain |
| q | Checking → Chapter |
| 7 - | Left forced air extractor |
| q | Checking → Chapter |
| q | Removing and installing → Chapter |
| 8 - | Right forced air extractor |
| q | Checking → Chapter |
| q | Removing and installing → Chapter |
| 9 - | Heated rear window -Z1- |
| q | Not part of air conditioner controls |
| q | Checking actuation → Current flow diagrams, Electrical fault finding and Fitting locations and „Guided fault-finding“Onboard supply control unit -J519- → Vehicle diagnostic tester |
| 10 - | Left water drain |
| q | Checking → Chapter |
| 11 - | Ambient temperature sensor -G17- |
| q | The measured value of the ambient temperature sensor -G17- is evaluated by the control unit in dash panel insert -J285- and transmitted via the data bus to the operating unit, Climatronic control unit -J255- / air conditioning system control unit -J301-. For checking, „read measured values“ in the „Guided fault-finding“ function, dash panel, air conditioner → Vehicle diagnostic tester |
| q | Removing and installing → Chapter |
| Component group „2“ |
| 1 - | Expansion valve |
Note| After switching off the air conditioner compressor, a relatively long period may elapse before the pressure on the high-pressure end decreases (the expansion valve is cold and the pressure on the low-pressure end increases rapidly after switch-off, the expansion valve closes and the refrigerant can only flow slowly to the low-pressure end). |
| q | Exploded view → Chapter |
| 2 - | Radiator fan -V7- |
| q | The request for radiator fan cut-in is transmitted by the operating unit, Climatronic control unit -J255- / air conditioning system control unit -J301- via the data bus to the corresponding engine control unit. This engine control unit then actuates the radiator fan -V7- directly or by way of the radiator fan control unit → Rep. gr.19 |
| q | To check actuation of the radiator fans by the operating unit, Climatronic control unit -J255- / air conditioning system control unit -J301-, „read measured values“ in the „Guided fault-finding“ function → Vehicle diagnostic tester |
| q | The corresponding engine control unit switches the radiator fan -V7- (either directly or by way of the radiator fan control unit) to any desired output (depending on engine type) → Vehicle diagnostic tester, „Guided fault-finding“ function and → Current flow diagrams, Electrical fault finding and Fitting locations. |
| q | Depending on the vehicle model, a radiator fan 2 -V177- may also be fitted → Rep. gr.19. |
| 3 - | Service connection on high-pressure end |
| q | For measurement, drainage and filling of refrigerant circuit → Air conditioner with refrigerant R134a |
| q | Cap with seal, always to be screwed on |
Caution
|
| 4 - | High-pressure sender -G65- |
| q | Removing and installing → Chapter |
| q | Checking → Chapter |
| q | 8 Nm |
| 5 - | Service connection on low-pressure end |
| q | For measurement and drainage of refrigerant circuit → Air conditioner with refrigerant R134a |
| q | Cap with seal, always to be screwed on |
Caution
|
| 6 - | Fresh air intake grille |
| q | Stops foreign matter (e.g. leaves) ingressing into the intake housing of the air conditioning unit |
| q | Check for proper attachment |
| q | Removing and installing → Chapter |
| 7 - | Condensation drain |
| q | Checking → Chapter |
| q | Removing and installing → Chapter |
