Cool down passenger compartment

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Turn on air conditioning compressor with "A/C button" at a vehicle interior temperature of 45 °C (measured at the head restraint).

On vehicles with MAX-AC button:

Activation of MAX-AC (= maximum cooling power)
On vehicles without MAX-AC button:
Set maximum cooling power by means of following steps:
- Setting minimum temperature
- Blower setting maximum
- Stratification maximum cold (4 blue bars)
- Only ventilation open
- Close remaining flaps (air outlet only from center fresh air grille, left and right)

After 5 minutes measure both ventilation temperatures with a thermometer at the same time (fresh air grille center, left and right). The measured temperature must be ≤ 16° C and the difference between right and left may not be greater than 2° C.

If one or both temperature specifications is not reached DRAIN OFF HEATING AND AIR CONDITIONING SYSTEM . Measure amount of refrigerant drawn off.

If drawn-off quantity does not correspond to specified fill quantity: supplement refrigerant and repeat test. See AMOUNT OF REFRIGERANT or AMOUNT OF REFRIGERANT (WITH REAR AIR CONDITIONING) .

If capacity is correct, continue troubleshooting by pressure measurement.