64 50... A/C performance test

WARNING: This page does not describe the selected car, but rather 18 other vehicles, including the 2015 BMW Alpina B7L xDrive, 2015 BMW Alpina B7 xDrive, 2015 BMW 750i xDrive, 2015 BMW 750Li xDrive, and 2015 BMW 740Li xDrive. However, it is still accessible from the selected car via links, so may be relevant.

Observe the following conditions prior to the A/C performance test:

Connect BMW diagnosis system. Check of the fault memory (no faults in the fault memory).
Attach a thermometer with separate display device to the head restraint and route the display device wiring out of the passenger compartment outward.
Perform the test in a suitable workshop area with an ambient temperature above 18° C.
Vehicle temperature should be approximately the same as the ambient temperature in the workshop.
Engine must be at operating temperature.

Heat passenger compartment:

"A/C button" is not activated during the heating process
Close all windows and doors.
Set air recirculation function.
Select air distribution mode for footwell and defrosting.
On vehicles with CID : In A/C menu (CID) in Air distribution index tab: select 100 % footwell for driver and front passenger and 100 % defrosting for driver (this applies here to driver and front passenger)
Maximum temperature setting
Maximum blower speed
Start engine

Cool down passenger compartment:

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 the amount of refrigerant drawn off and compare with the NOMINAL FILL AMOUNT .

Check whether refrigerant loss is present:

If there is a PERMISSIBLE LOSS of refrigerant, fill the refrigerant circuit with the NOMINAL FILL AMOUNT .
If there is an IMPERMISSIBLE LOSS of refrigerant, CHECK THE REFRIGERANT CIRCUIT FOR TIGHTNESS . After rectifying the leak, fill the refrigerant circuit with the NOMINAL FILL AMOUNT .