190E cuts out

my 190E has had a habit of cutting out usually as i am coasting to a junction or starting out from one. VERY DANGEROUS now the problem is worse it cuts out and although it will restart it cuts out again after 3 to 10 seconds. the dealer cannot trace any fault and has changed several parts in an effort to cure but all to no avail yesterday the AA patrolman tried for two hours but could not diagnose the problem after he had admitted defeat. suddenly for no accountable reason the car ran perfectly again. then today the problem returned without any warning can anyone help or suggest a cure?

Reply to
oldjoe
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Check the "Return To Tank" fuel line on the fuel distributor to make sure that it is not plugged. If it is, the distributor can not control fuel mixture.

That was the problem on my 230CE. My symptom was no restart when hot. After cooling down it started fine. Out of curiosity, I checked a 190E and it was about 90% restricted with rust.

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Reply to
Scott Buchanan

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I would start with a "wiggle" test. With the engine idling wiggle and pull on every electrical connection you can get your hands on until the symptom is reproduced.

Reply to
rurlndum

What year is your 190E? On early version, you would have fuel pump relay... on later version, you need Klima relay (where fuel pump relay and AC relay combines). Another possible cause is the overload relay (the one with red fuse on the top) cause this problem. This is typical parts to replace for this problem.

There is another part but that depends if you have 4 or 6 cylinders.

Reply to
Tiger

thanks for your reply this sounds vrey useful I will check this first thing tomor

"Scott Buchanan" wrote

Reply to
oldjoe

most problems on these seem to be the OVP relay behind the battery, shake it to see if it rattles, and check the fuse....

Reply to
mike

Just came across this thread.

Interestingly I have had what appears to be a similar problem with my 1993

190E 2 litre. I have called the RAC twice (Britain's other major motoring organisation). For afficionados of London, once I broke down near Parliament Square in the morning rush-hour among the roadworks which narrow the side street, on the school run...

Nothing found. A new fuel pump relay -- previously fitted by an independent garage -- did not solve it.

The car was taken to a Merc garage for testing. They could not reproduce the problem, just once they said they had what might have been a cut-out. (They didn't charge me!) Their suggestion for dealing with it cost several hundred pounds and was not a guaranteed fix, so I left it.

It seems I could just leave the car to stand and it will restart after a few minutes. Hasn't happened for a while, though. The car passed its MoT test (annual British roadworthiness test) without any problems and runs well.

Weird.

DAS

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Reply to
Dori A Schmetterling

In your case, I would suspect the overload protection relay.

Reply to
Tiger

Interesting. Shall suggest it to Merc....

Thx very much.

DAS

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Reply to
Dori A Schmetterling

PS. I had another cut-out issue on my 2001 CLK 320 bu there the Merc garage pulled off the e-data for immediate diagnosis and repair.

The 190E yields very little data, being such an old car.

DAS

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Reply to
Dori A Schmetterling

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