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?

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 1,000 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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Engine slows, shakes, clicks, and quits - 1993 Mercedes Benz 500 SEL

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: Having to pump gas to start car

Hi there, when you press on the gas pedal the engine opens up the throttle to allow more air to flow into the cylinders. Since you have to press on the gas to start the engine there may be an...

Q: I think I may need new engine mounts. Would that cost a lot and are the parts good quality? Also, I d

Hello. I will be happy to help you with your concerns about the mechanical condition of your 1999 Solara. Let me first answer what is by far the easiest component of your inquiry and that relates to "will the parts...

Q: Reduced engine check engine

It is possible that this could be related to your mass air flow sensor on your 2001 Honda Passport. The mass air flow sensor and the throttle position sensor work in conjunction with each other to send signals to the...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.