I purchased a high mileage 190d with a non-functioning A/C. Took it to an independent shop to see if they could troubleshoot the problem. Ended up putting in a GM pressure switch with a rocker switch to activate the A/C instead of the climate control system. Now when the A/C is going I can actually hear a half second sucking sound through the middle vents. This occurs about every 4-5 seconds and also causes hesitation in the engine. Any ideas? Also the transmission acts like it is slipping, (revs to 4000 rpm if I don't release the accelerator), going into 2nd and 3rd gear when I first start and run the car. This is a new transmission about 30K ago.

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Randy Rose

You did what??? Take this to a Mercedes Repair shop.

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Benzmac:
Donnie Drummonds
1992 500E (very soon I hope :)
1981 280GE SWB
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM

The closest MB repair shop is 250 miles away. I think my best option is to resell the thing if no one else can work on them. I thought this would be a good low maintenance option for my daily commute, being a diesel and all.

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Randy Rose