Question about 1996 Mercedes-Benz C-Class

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1996 C180 auto. From time to time the engine won't idle and stalls when I slow down. Then the problem disappears for a couple of weeks or longer. Plugs were renewed six months ago, as was fuel filter. Otherwise it's a great car, FSH etc.

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  • Aki Aug 24, 2010

    Is there a CHECK ENGINE light on or does one come on when you experiance this problem?

  • angusm754 Aug 25, 2010

    No light comes on until the engine actually stops, then all the lights come on as normal. For example, when approaching a 'stop' sign I take my foot off the accelerator pedal to slow down but the engine stops altogether. I then start the engine again but I have to keep my foot on the accelerator pedal to keep the engine running while I engage gear (with my left foot on the brake pedal). This makes driving difficult in slow moving traffic. After a while the problem disappears and I might not experience it again for a couple of weeks.

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Sounds like you might have a problem with the idle circuit of the vehicle, where the car does not know how to increase the RPM to keep the vehicle running on deceleration. I would have you go into a repair shop there is nothing that you can do at this point they will have to check ALOT of stuff to figure if its a sensor,fuel pressure, ignition and so forth. I think its computer control related without actually running tests hard for me to guide you to where your next step is.

Over all you need to make sure you get this car working correctly cause of the liability you are on the road when its not running right, to yourself and others. Safety 1st.

Posted on Aug 25, 2010

Testimonial: "Thank you. I don't know if the car is worth the cost of replacing the ECU which may well be the source of the problem. I'll take it into the garage."

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Posted on Jan 02, 2017

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