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Air Conditioning Issue on W212 M272.980

I have a Mercedes E-350 (W212 M272.980) and having AC problem. When I am parked and start the car, the AC works only from the driver's side and the passenger side blows regular air. But when I start driving both sides give regular air when the AC is turned on. I had a mechanic inject dye to check any leaks and found NO leaks. Could you help on resolving this issue please? Wanted to get your opinion.

Thank you in advance!

1 answer0 replies

1 Comment

Senior Leigh | 老李

Jul 12, 2021

After discussing with a friend, we considered two problems with that.

1st, Lacking the refrigerant;

2nd, One or more of the stepping motor failures.

For 1st, you might check the pressure of the AC; For 2nd, you might connect an MB Star to read the error code and test the stepping motor.