Air Conditioning
- Safety precautions
- A/C system, general repair guidelines
- Refrigerant system, servicing
- Compressor, removing and installing from bracket
- Belt pulley/drive unit of compressor, replacing
- Belt pulley (version 1), replacing
- Pulley, removing from compressor and re-installing (version 1)
- Belt pulley (version 2), replacing
- Pulley, removing from compressor and re-installing (version "2")
- Compressor drive unit, checking, replacing
- Compressor drive shaft, loosening and tightening
- Compressor drive shaft, removing and installing
- Drive plate with overload protection, removing and installing
- Run-out of drive plate with overload protection, checking and adjusting
- Drive plate to compressor, removing and installing
- Drive plate with roller bearing, removing and installing
- A/C system control and regulation components
- Notes
- Components in engine compartment and rear of vehicle
- Dust and pollen filter element, removing and installing
- Dust and pollen filter with active-carbon-filter element
- Sensor for air quality -G238-, removing and installing
- Air extraction vent, checking
- Components in passenger compartment
- A/C control head -E87-, removing and installing
- Air guide connection for glove compartment cooling, removing and installing
- Control module for fresh air blower -J126- and Fresh Air Blower -V2-, removing and installing
- Left Vent Temperature Sensor -G150-, removing and installing
- Right Vent Temperature Sensor -G151-, removing and installing
- Evaporator Vent Temperature Sensor -G263-, removing and installing
- Left Footwell Vent Temperature Sensor -G261-, removing and installing
- Right Footwell Vent Temperature Sensor - G262-, removing and installing
- Sunlight Photo Sensor -G107-, removing and installing
- Evaporator housing drain, removing and installing
- Evaporator housing drain, checking
- Adapter cable, modifying to activate positioning motors
- Defroster flap motor -V107-, removing and installing
- Actuator for temperature flap right -V159-, removing and installing
- Actuator for temperature flap left -V158-, removing and installing
- Central Air Flap Motor -V70-, removing and installing
- Recirculation Flap Motor -V113-, removing and installing
- Air Flow Flap Motor -V71-, removing and installing
- Fresh Air Intake Duct Temperature Sensor -G89-, removing and installing
- Heater core, removing and installing
- Instrument panel vents and air ducts
- A/C refrigerant system, testing
- A/C refrigerant system cooling performance, testing
- Special tools and equipment
- Test requirements:
- Checking
- Identifying malfunctions if specified values are not obtained
- Notes
- Identifying malfunctions at temperature increase behind condenser
- A/C refrigerant system, leak testing
- A/C refrigerant system, testing with pressure gauges
- A/C refrigerant system, checking pressures
- Notes
- Test requirements
- Preparation work
- Checking
- If A/C refrigerant system base pressure is less than specified on chart, system is low on refrigerant:
- If A/C refrigerant system pressure corresponds to or is higher than base pressure specified on chart:
- Pressure in A/C system corresponds to chart or is higher:
- A/C refrigerant system (R-134a), discharging
- A/C refrigerant system (R-134a), evacuating and recharging
- A/C refrigerant system (R-134a), flushing with compressed air and nitrogen
- A/C refrigerant system cooling performance, testing
- A/C refrigerant system, servicing
- Compressor, removing and installing
- Refrigerant lines on compressor, removing and installing
- Compressor, removing and installing (for vehicles with a 4 or 6 cyl. engine)
- Compressor, removing and installing (vehicles with 8 cyl. engine)
- A/C system, running after installing compressor
- Refrigerant lines on evaporator flange, removing and installing
- Refrigerant lines for condenser, removing and installing
- Condenser, removing and installing
- Restrictor, removing and installing
- Accumulator, removing and installing
- A/C refrigerant system, capacities
- Heating and A/C unit, component overview
- A/C system, troubleshooting
- Test requirements
- A/C does not cool (cooling has stopped completely)
- Insufficient cooling during all driving or engine speed (RPM)
- A/C compressor noisy
- A/C compressor noisy immediately after switching A/C ON and/or when driving around corners or braking "refrigerant shock"- refrigerant system overcharged:
- With an otherwise properly operating A/C system, water sprays out of instrument panel vents:
- A/C system, replacing components
- Notes
- For leaking or damaged components (except for compressor and accumulator), A/C system was completely empty (no charge):
- For leaky or damaged components (except for the compressor and accumulator) there is still refrigerant in the A/C system:
- Replace compressor, without it being necessary to blow through the refrigerant system with compressed air and nitrogen (e.g. exterior damage after an accident):
- Replace compressor due to leaks or interior damage (e.g. noises or no power):
- Replace accumulator and restrictor after blowing through the A/C system e.g. caused by penetrating moisture (the A/C system was open over a long period of time) or contamination (dirt):
- Replace accumulator, without it being necessary to blow through A/C system with compressed air and nitrogen (e.g. damage caused by an accident), no refrigerant flowed out and no moisture and dirt have penetrated the circuit: