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

WARNING: This page is about a different car, the 2011 BMW 750xi, 2011 BMW 750Lxi, 2010 BMW 750xi, and 2010 BMW 750Lxi. However, it is still accessible from the selected car via links, so may be relevant.
  1. Connect BMW diagnosis system. Check of the fault memory (no faults in the fault memory).
  2. Attach a thermometer with separate display device to the head restraint and route the display device wiring out of the passenger compartment outward.
  3. Perform the test in a suitable workshop area with an ambient temperature above 18° C.
  4. Vehicle temperature should be approximately the same as the ambient temperature in the workshop.
  5. Engine must be at operating temperature.
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