Procedure For First Engine Start After Charging Refrigerant Circuit: Procedure

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-- Connect the Vehicle Diagnostic Tester.

-- Select Diagnostic mode and start the diagnosis.

-- Select the Test plan tab.

-- Press the Select custom test button and select the following tree structure in order:

Body
Heating, Ventilation & Air Conditioning
OBD-capable systems
08- A/C/Heater Electronics - E87
08- A/C/Heater Electronics - Functions
08 - Basic Setting
→ Basic setting 3, compressor cut-in

Continuation for All Vehicles:

Note the Following when Starting Engine for First Time after Filling Refrigerant Circuit:

-- Open all instrument panel vents.

-- Switch the ignition on.

-- Adjust the "OFF" mode on the Front A/C Display Control Head -E87- (and on a vehicle with a "High" A/C system on the Rear A/C Display Control Head -E265-) the indicator lamp in the A/C and the A/C MAX button of the Front A/C Display Control Head -E87- does not turn on. The A/C system and the activation of the A/C compressor are switched off by the A/C Compressor Regulator Valve -N280-.

-- Start the engine with the A/C compressor switched off and wait until the engine idling speed has stabilized.

Set the following on the Front A/C Display Control Head -E87- :

"Auto" mode - the indicator lamp in the AUTO button turns on.
A/C compressor is on - the indicator lamp in the A/C button turns on.

-- If possible select on the Front A/C Display Control Head -E87- the SYNC functions.

-- Check the indicator lamps in the AUTO buttons on the Front A/C Display Control Head -E87- (and the Rear A/C Display Control Head -E265- if present). If they do not turn on, press the AUTO buttons.

-- Set the temperature preset for the driver side (and front passenger side) on the Front A/C Display Control Head -E87- to "cold".

-- Check the temperature preset for the front passenger side on the Front A/C Display Control Head -E87- (and also on the Rear A/C Display Control Head -E265- if present) and set it to "cold" if necessary.

-- Allow the engine to idle for at least five minutes with the A/C compressor switched on.