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Mercedes-Benz engine repair questions and answers

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  • AutoMD Member
    AutoMD Member - 2003 Mercedes Benz C240 - Engine - 7/24/2014
    Car will not restart after I shut it down
    was driving along fine when I felt the car lose power and go slow even though I was stepping on gas pedal, pulled over and shut car off to restart and maybe reset whatever was wrong. Car turns over but will not start, couple of times it seemed to start only to ...
     
    0 answer
  • AutoMD Member
    AutoMD Member - 1990 Mercedes Benz 500SL - Engine - 7/24/2014
    How do you adjust the belt tension
    After replacing the serpentine belt it appears loose even though the tensioner has plenty of resistance and travel
     
    0 answer
  • AutoMD Member
    AutoMD Member - 1990 Mercedes Benz 500SL - Engine - 7/24/2014
    How do you adjust the belt tension
    After replacing the serpentine belt it appears loose even though the tensioner has plenty of resistance and travel
     
    0 answer
  • AutoMD Member
    AutoMD Member - 1981 Mercedes Benz 380SL - Engine - 7/21/2014
    The motor lose the power when I drive at high speed
    My car works normally in the city at low speed, but when I drive on the highway at high speed 60 to 75 MPH after a while, the car starts lose the power I push the gas pedal but the car not responds then the motor turn off, after some minutes the motor start again ...
     
    0 answer
  • AutoMD Member
    AutoMD Member - 1981 Mercedes Benz 380SL - Engine - 7/21/2014
    The motor lose the power when a run at high speed
    My car works normally in the city at low speed, but when I drive on the highway at high speed 60 to 75 MPH after a while, the car starts lose the power I push the gas pedal but the car not responds then the motor turn off, after some minutes the motor start again ...
     
    0 answer
  • AutoMD Member
    AutoMD Member - 1989 Mercedes Benz 420SEL - Engine - 7/21/2014
    Identifying correct cruise control amplifier.
    Replaced amplifier in 2010. From APW, part number WO1331601333, which has 14 + 8 male pins. New amp ordered has only 14 pins w/WO1331602420. I think chassis # is 126.035 eng # 116.965. Amp OEM # may be 0055450532-88.
     
    0 answer
  • SunnyMoe
    SunnyMoe - 2002 Mercedes Benz S430 - Engine - 7/19/2014
    My car hesitates to accelerate when gas pedal is being pushed
    If I'm at a red light that turns green my car doesn't immediately take off the gas pedal has to be pushed hard
     
    • Jimm
      7/19/2014 Jimm
      First step - have the stored fault codes or check engine light scanned - for free - at any local auto parts store; Advance Auto, Auto Zone, NAPA. Then, post a reply as 'add answer' with the specific code for more assistance. There may be a fault code stored in the OBD memory which may not be displayed as a check engine light.

      Possible Causes of Engine Hesitation or Stumble:

      Dirty fuel injectors (cleaning the injectors often fixes this)
      Dirty air filter (change filter)
      Dirty / clogged fuel filter (change filter)
      Bad MAP (manifold absolute pressure) sensor
      Bad TPS (throttle position) sensor
      Bad or dirty MAF (mass airflow) sensor
      Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
      Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
      Bad gasoline (fuel contaminated with water or too much alcohol)

      Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include:

      Dirty or worn spark plugs
      Bad plug wires
      Weak ignition coil
      Wet plug wires
  • AutoMD Member
    AutoMD Member - 2006 Mercedes Benz C230 - Engine - 7/18/2014
    What color is antifreeze suppose to be ? Weird smell after my car is started what could it be ?
    I have what i believe to be oil in my antifreeze. The antifreeze looks dark, but i dont know what color its suppose to be. And after the car is started there is a weird scent in the car. The engine runs perfect though. If anybody knows anything please help.
     
    0 answer
  • AutoMD Member
    AutoMD Member - 2006 Mercedes Benz C230 - Engine - 7/18/2014
    What color is antifreeze suppose to be ? Weird smell after my car is started what could it be ?
    I have what i believe to be oil in my antifreeze. The antifreeze looks dark, but i dont know what color its suppose to be. And after the car is started there is a weird scent in the car. The engine runs perfect though. If anybody knows anything please help.
     
    0 answer
  • AutoMD Member
    AutoMD Member - 1982 Mercedes Benz 380SL - Engine - 7/18/2014
    I replaced the O2 sensor, but the dash light is still on. What else do I need to do?
    My engine in my car had a major overhaul at 106,000 miles. I bought it at 114,000 miles and the light was on then. It seems to run OK, but it does idle rough.
     
  • AutoMD Member
    AutoMD Member - 1996 Mercedes Benz E320 - Engine - 7/17/2014
    Engine cranks but no fuel to engine
    at repair place think it could be a control mod
     
    0 answer
  • AutoMD Member
    AutoMD Member - 1999 Mercedes Benz ML430 - Engine - 7/10/2014
    My cars runs good the only probleam is that when im in a red light my car stops i put it on parking and stars back on
    my mileage on the car is 135,000 it only does it once in while but my check ingine is on it has several codes p.o173,p.o300,p.o303,302 ,304and 301
     
    0 answer
  • SunnyMoe
    SunnyMoe - 2002 Mercedes Benz S430 - Engine - 7/8/2014
    My car hesitates when I try to accelerate what could be the problem ??
    If I'm at a red light that changes to green when trying to go it doesn't go
     
    0 answer
  • SunnyMoe
    SunnyMoe - 2002 Mercedes Benz S430 - Engine - 7/8/2014
    My car hesitates when I try to accelerate what could be the problem ??
    If I'm at a red light that changes to green when trying to go it doesn't go
     
    0 answer
  • Gene
    Gene - 2003 Mercedes Benz E320 - Engine - 7/6/2014
    What to do when engine quits
    It was running smoothly then I accidentally choke it manually then it's sputtering to stop
     
    0 answer
 
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