| Checking components actuated by the air conditioning system control unit |
| By the operating and display unit, Climatronic control unit -J255- (for the automatically controlled air conditioner) |
| Air conditioner controls, air conditioning system control unit -J301- (for the manually controlled air conditioner) |
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| Checking of heated rear window -Z1- → Chapter |
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| Checking actuation of seat heating (optional extra) → Chapter |
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| Checking actuation of supplementary heater → Chapter. |
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| Checking operation of air recirculation flap control motor -V113- and fresh-air/air recirculation control button → Chapter. |
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| Checking supplementary air heater → Chapter. |
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