I have a 1993 600SEL with 55,250 original miles. The other day after driving about 100 miles round trip, while driving for some time at approx. 35 MPH the engine lost power.
I could 'floor it' and yet the engine barely had any power and very slowly crept up on RPM and then at 4,000 RPM changed gears. The car would come up to about 45 MPH but it was a struggle.
WHen at a stop light I put it in neutral/park and tried to rev the engine. It would only go to about 2,500 rpm and running very rough.
Almost like there was lack of gas or air coming to the engine.
Any ideas what may be causing this? HELP!