Hello,

My 560SEL has been running perfectly for two years! It has 135k miles and maintained well. Yesterday, after running for 20 minutes at 70 MPH I had no acceleration but the car didn't stall. It came back to normal in 3-4 seconds....then did it again less than a minute later. I pulled off the freeway and shut off the engine and it restarted normally. I drove for another hour....freeway; stop and go traffic; 95 degree heat. Last night, after 20 minutes, the same symptoms.....sudden loss of power. I was driving in a 30 MPH zone...I placed in neutral and rev'd.....the rpm jumped to 4k with no problem. The power loss kept repeating for the next 3 miles home. I rev'd in neutral a few more times and if I let up completely on the accelerator the engine stalled sometimes. It always restarted normally.

It should be noted that the idle is smooth; starts normal and quick; does not stumble or sputter when power loss occurs; no backfire.

Thanks for your help!

__________________
All the best,

J. P. Mose
1968 250SL
1970 280SE 3.5 Cabrio
1987 560SL
1990 560SEL