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| The ambient air temperature is above 15 °C. |
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| The radiator and condenser are clean; clean if they are not. |
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| The compressor Poly-V belt is in good condition and properly tensed. |
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| All air flow ducts, protective covers, gaskets/seals are in good condition and correctly fitted. |
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| Air flow through dust and pollen filter not impeded by dirt |
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| The fresh air is taken in through the fresh-air intake ducts in the engine compartment and in the interior. |
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| The water drainage valves in the fresh air intake ducts in the engine compartment are in good condition. |
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| The vehicle should not be in direct sunlight |
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| The engine must be warm. |
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| Consult the fault memory and erase it. |
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| Perform the basic configuration. |
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| All aerators on the dashboard are open. |
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| Settings for the control and indication unit -E87-: |
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| Temperature selection „LO“. |
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| Compressor activated (the light on the „ECON“ button lights up). |
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| Functions with the engine is running: |
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| The radiator fan -V7- runs (at least: Level 1) |
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| The fresh air blower -V2- is running at maximum speed. |
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| The fresh air / air recirculation flap is located in the „air recirculation“ position (approx. 1 minute after starting engine, air is drawn in by the fresh air blower -V2- to the front passenger's footwell) |
Note | If any of these conditions are not fulfilled during the test, consult the fault memory and perform and actuator diagnostic → Vehicle diagnostic tester. |
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