Occaisonally at stoplight car acts like its running on less than all eight.Hard miss. pulling away from light, slight bog, then smooth as silk. I.m leaning toward fuel related, but have only had car a couple of months and don't know how it was serviced other than a/c converted by MB dealer. Car is almost showroom with 138k miles. Shows 2300 rpm at 70mph, is that in ballpark? 1987 420sel

Any and all help greatly appreciated, Art

I have the same problem but on a 560sel.

I have

1) changed plugs
2) Fuel filter
3) Cap and rotor
4) Gas tank screen
5) Fuel pressure and volume tested.

Still have the problem every once in a while.

I am leaning towards replace the OVP.

I will keep you all informed.

tested compression? yoiu could have a cylinder with low compression.

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.