BMW 5 Series: Issues with Automatic Temperature Control

Start by checking the connections and wiring for the temperature mixing flap motor and potentiometer to ensure they are secure and not damaged. Inspect the air box to confirm if it is the correct model for your vehicle. For the heater issue, verify that the latent heat storage temperature sensor is functioning properly and not obstructed. If these checks don't resolve the problem, it might be best to consult a professional mechanic. Let me know how it goes or if you have any further questions!

Hello BMW M550d air conditioning works intermittently

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Start by checking the refrigerant level in your air conditioning system, as low refrigerant can cause intermittent cooling. If the level is fine, inspect the AC compressor clutch and relay for any signs of wear or failure. Let me know if you need further assistance or if the issue persists!

Thank you for your response, but where is the refrigerant located to check the level? Or where is the compressor clutch and relay located? Thank you

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The refrigerant level is checked at the low-pressure service port, usually located on the larger of the two AC lines coming from the compressor. The AC compressor is typically found at the front of the engine, driven by the serpentine belt. The compressor clutch is part of the compressor assembly, and the relay is usually located in the fuse box. If you're unsure or uncomfortable checking these, it's best to have a professional mechanic inspect it. Let me know if you have any more questions!