Question about 1984 Mercedes-Benz 190

1 Answer

1991 Mercedes 190 starts but cuts out when driving

Have had the fuel pump relay replaced (Could this burn out in two weeks?)

It starts but then drives for 30 secs (or it could be ten minutes or twenty minutes) and cuts out when driving say 20 - 25 miles per hour.

When I try to restart it starts ok but the rev counter drops immediately and it cuts out. This can happen 15 times before the start will be maintained and then it can happen slowing for a traffic light five
minutes later.

My mechanic is stumped. Lizzie in London

Posted by on

  • venusianuk Jan 27, 2009

    Dear Emissionwhiz

    I passed your comments on to my mechanic who dismissed them at first. Three days later he phoned me to say he had replaced the fuel pump and the relays and a month later (fingers crossed) all is well. Thank you so very much for helping us and enabling me to drive again with confidence. Without your advice we would still be struggling. You deserve your Guru status. I'm very grateful.

    Best wishes Lizzie in London

  • Anonymous Mar 12, 2014

    It is mounted on a valance over the kitchen window. I have tried various positions from plumb to at least five eights inch out at the top. I am very mechanically minded, but this has me stumped.



1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.


    An expert that got 20 achievements.


    An expert that got 10 achievements.

  • Mercedes-Benz Master
  • 83,850 Answers

You could have a defective fuel pump, when they go bad they can draw enough current to fry the relay contacts, so I would suggest you test how many amps the fuel pump is drawing, I have fixed this very issue of repeated relay replacements, it was always the pump was shot.

Posted on Dec 22, 2008


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Engine stop

It could be the fuel pump relay.i had similar thing with an mk2 astra that would cut out then in a short while start again.
Good luck!

Sep 07, 2014 | 1989 Mercedes-Benz 190

2 Answers

I ren out of gas & now my car wont start 1991

make sure the car is on a flat surface ,you can pour a little bit of gas down the throttle body or spray starter fluid in throttle body that should crank the car

May 09, 2011 | 1991 Mercedes-Benz 190

1 Answer

Hi , i have a 02 yukon and was driving it and the motor shut down. i can start it right away, but when i press on the gas it shuts off. is this a fuel pump problem or a relay problem?


Nov 26, 2010 | 1993 Mercedes-Benz 190

1 Answer

Mercedes 300ce Engine cuts out at any speed, even when ideling.

It sounds like a fuel delivery issue. Mercedes recommends replacing the fuel filter every 60k. If it has been longer than thast since the filter change start there. Fuel pump relays are another common problem on this era. They are located behind the battery. Remove the plastic cover and you will se 2 black relays( yours may have a mass relay if it is a 90 model year, it will have a plastic knob on top that you turn to the left to unsecure it) IT will say kickdown on it the climate control is the other relay and it will say klima. Look for signs of corrosion on the solder pins. If your fuel pump(located at the right rear) is very noisy when it operates I wouild recommend replacing it. During this era of Benz about the only way to diagnose this would be to run a bunch of fuel pressure tests and to drive vehicle with a meter on the relay and on the pump to see if the relay cuts out or the pump cuts out. I always recommend to do both pump and relay because they can cause one another to fail. good luck.

Sep 19, 2009 | 1987 Mercedes-Benz 300-Class

1 Answer

Car dies after about 20 minutes of driving,sputters slightly .

The fuel pump relay needs to be replaced. it is behind the battery and the fire wall.

Sep 11, 2009 | 1989 Mercedes-Benz 300-Class

2 Answers

Car won't stay on when given fuel

did u try replacing the fuel filter

Aug 28, 2009 | 1993 Mercedes-Benz 190

4 Answers

Mercedes benz 1992 190E

Lift the hood. Just below the screen, opposite side from battery, you'll see a plastic cover shielding the engine management, abs control box etc. If you search around there after removing the shield/ cover you will find a relay with a fuse plugged into the top of it. This is the pump / system relay.

Cheers John

Nov 13, 2008 | 1992 Mercedes-Benz 190

1 Answer

Drivers authorisation system on mercedes

My car is a 1.8 - E 190 , 1993 model. The car is in a good condiction and done only 93,000 miles. It never gave me any problems up to now and for that reason I love it. The problem developed last week is that, it is difficult to start and when it starts sometimes it does not rev up and the engine cuts off. The ignition side is OK with new spark plugs, rotor arm and adistributer head. The hi-tension leads seems OK. I sort advise from people with Merc knowledge. There suggestion is perhaps it is the malfunctioning of the fuel pump relay. I have difficulty in locating this part. Can anyone please advice me how to overcome this problem and the location of the fuel pump relay. I am a professional Mecanical Engineer with reasonable knowledge in car mechanics.

Jul 10, 2008 | 1997 Mercedes-Benz C-Class

Not finding what you are looking for?
Cars & Trucks Logo

297 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mercedes-Benz Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22413 Answers


Level 3 Expert

83850 Answers


Level 2 Expert

169 Answers

Are you a Mercedes-Benz Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides