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Date registered: Dec 2002
Vehicle: 2001 E320W(ELEGANCE) 2005 CLK500
Location: Lexington, Kentucky
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Missing, hesitating misfire at slow speeds
I had my '92 500 SL into my mechanic last week for a recurring missing and hesitation and rough idle problem. I wanted him to replace the distributer caps, rotors and spark plugs in the hopes that would cure the problem.
When I picked it up he had replaced a vacuum hose and said that the car needed to be driven more to keep it in shape (It only gets driven about 500 miles a year), and that the other stuff wasn't needed. I did notice that it was idling smoother and seemed to have more power. I thought great, saved about $400!
Got the car out this morning and yes, all of the old symptoms are back with the exception of the rough idle. He suggested a bottle of techron fuel injector cleaner and some hard driving.
I put in a bottle of the techron and drove the hell out of it! The hesitation really is major. It misfires and drags until about 25 MPH then it kicks in and jolts so fast it even makes the drive belt scream!
Should I just take it back and DEMAND that he change the ignition parts or do you think he's right and just need to drive it more?
Thanks for your help!
2001 E320W (ELEGANCE)
2005 CLK500 Cabriolet