On my 88 300sel, when I start in the morning, the rpm varies from 500 to 1500 back & forth and I can feel a slight hesitation at highway speeds when warm.I also notice a fluctuation on the vacuum(economy) gauge. Should I be looking at the ignition? or possibly the fuel filter? We purchased it used and I've yet to do either on the car so far. Thanks

Start with a trip to the shop and have a major service done if none has been done. This car gets a 15k mile service and a 30k mile big service.

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Benzmac:
1981 280GE SWB
1987 16V
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
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