Skip the auto shop - Our mechanics make house calls

Q: Engine slows, shakes, clicks, and quits - 1993 Mercedes Benz 500 SEL

asked by on

After having driven a few miles my car slows down, stops, I press on the gas pedal to accelerate, the car starts to shake and then a clicking sound and the engine dies. The battery light comes on and the car will not start for 30-60 minutes. Then it runs fine. I have researched and from what I understand, the problem might be the fuel pump relay. I have been searching for the fuel pump relay seat. I have replaced 8 spark plugs, fuel filter and connector line, air filter, fuel vent valve, charcoal canister, but none of this solved the problem. The engine still quits. An interesting note is that on a hot day when I’m driving on the highway, it does not stall. What is your advice for what I should do to solve my car’s problem?

A: Hi there, thanks for writing in. The fuel p...

Hi there, thanks for writing in. The fuel pump relay is located in the trunk on the right side below and to the right of the computer module. I recommend replacing the relay first after checking connections for any corrosion on connections. If the relay shows signs of heat damage then the fuel pumps may be drawing excessive amperage and would need to be replaced along with relay and its connection.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Why does my vehicle feel like it's being forced to move?

Hi there. If the engine continues to overheat after fixing a core plug leaking, then the thermostat may not be opening all the way and needs replaced. As far as the vehicle not wanting to move and seems like the...

Q: Car shakes and stutters during acceleration - 2001 Toyota Echo

As I was reading this I was thinking spark plugs, but you said there was a couple CENTIMETERS of translucent yellow oil? I can't even imagine what must be happening inside the engine to completely cover spark plugs. I would...

Q: Misfires while idling

Hello there, thank you for asking about your 1986 BMW 635CSi. It sounds like you've checked all of the low hanging fruit. The previous owner may be right - some vehicles (only German ones come to mind) can develop a...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...