Auto Answers » Engine » Mercedes-Benz

Mercedes-Benz engine repair questions and answers

Post your Mercedes-Benz engine question or share what you know by answering questions

1736 Questions
Sort by:
  • garycolesr
    garycolesr - 2011 Mercedes Benz CLS550 - Engine - 4/15/2015
    A/C stopped working, full charge of freon, all fuses good,no power at the a/c compressor
    scanned, no faults present, all of the climate controls inside are working correct, 26,000 miles
     
    0 answer
  • Keith D
    Keith D - 2008 Mercedes Benz CLK350 - Engine - 4/13/2015
    Problems after engine replacement. Could the improper installation of the radiator and alternator caused other problems.
    During heavy rain I got stuck in shallow water and the engine ceased. The engine was replaced in October 2014 by a Mercedes dealer. The day after I got the car back I noticed oil leaking. Brought the car back and they replaced the oil pan. On 2.25.15 the car would ...
     
    0 answer
  • Dennis
    Dennis - 1993 Mercedes Benz 190E - Engine - 4/11/2015
    What would cause the car to bog down when I hit the gas?
    -This problem does not happen every time I drive the car -When sitting at idle and the car in "drive", the car will bog down, then go back to normal idle many times within the span of one minute -when I hit the gas, the car will bog down, I'll let off the gas, ...
     
    • Jimm
      4/11/2015 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.

      This aspect is important; there may be a fault code stored in the OBD memory which may not be displayed as a check engine light.

      Do not skip this important first step - there are literally hundreds of possible fault codes. Avoid wasting/ throwing money at the problem.

      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
  • Dennis
    Dennis - 1993 Mercedes Benz 190E - Engine - 4/11/2015
    What would cause the car to bog down when I hit the gas?
    -This problem does not happen every time I drive the car -When sitting at idle and the car in "drive", the car will bog down, then go back to normal idle many times within the span of one minute -when I hit the gas, the car will bog down, I'll let off the gas, ...
     
    • Jimm
      4/11/2015 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.

      This aspect is important; there may be a fault code stored in the OBD memory which may not be displayed as a check engine light.

      Do not skip this important first step - there are literally hundreds of possible fault codes. Avoid wasting/ throwing money at the problem.

      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
      Jimm
      4/12/2015 Dennis
      I went to both autozone and advance auto parts, neither were able to scan my car because their scanners only work on cars 1996 and newer (my car is a 1993). But today, the car drove perfectly fine, started up first try and no hesitation when I hit the gas. Yesterday, after the car had been sitting for a week, I had the hesitation problem when I would hit the gas too quickly and the problem where the car would take a few minutes to start. Today, neither of those problems happened.
  • Keith D
    Keith D - 2008 Mercedes Benz CLK350 - Engine - 4/11/2015
    My car engine has had a whining sound since it was replaced in Oct0ber
    The engine was replaced in October, The next day I noticed oil leaking and took the car back to Mercedes. They replaced the oil pan. On February 25th the car would not start, I had it towed to Mercedes. They said the fuel pump had a electrical fault and replaced it, ...
     
    0 answer
  • jamie higham
    jamie higham - 1989 Mercedes Benz 560SEC - Engine - 3/23/2015
    What can make my car just stop running like the key turned off and then it restarts after a min or 2
    I have replaced the feul distributor
     
    0 answer
  • AutoMD Member
    AutoMD Member - 2005 Mercedes Benz C230 - Engine - 3/17/2015
    Why am I getting "ESP Not Available" Message?
    Seems to be an electrical problem since my radio, lights and dashboard have fluctuations of power and it does not allow my gear to auto shift momentarily. Almost always have to shut it down and restart.
     
    • Carrera901
      3/17/2015 Carrera901
      If you have recently replaced your car battery or disconnected the car battery to check for electrical concerns, the ESP light will come on after reconnecting your car battery cables...Pos. first, then ground cable. Get in the car and make sure all doors are closed and turn the ignition key, but DO NOT Start the engine for at least 45 seconds to a minute. This allows the electrical system to check all electrical components for any fault codes etc. After waiting a minute, start the car and drive at least 9 mph or more for at least a block or so. This should clear the ESP light. If not, check for a blown fuse or replace ESP switch if it checks out to be faulty. Good luck with this one. I have seen this error message listed in the owners manual after a battery change out, or battery disconnect. Hope this helps.
  • Delroy
    Delroy - 1998 Mercedes Benz C230 - Engine - 3/17/2015
    Car shuts for while driving, Engine turns over, but wont start, b 15 amp fuse on module block, in panel?
    The Module (ABS + PC)part #A 000 540 00 72, is in the left electrical control panel (Rt front not electrical accessories fuse box)) this Module was found to have bad 15 amp fuse, but blows as soon as the ignition was turned on. Changed the Fuel Pump relay on the ...
     
    • Carrera901
      3/17/2015 Carrera901
      You either have a bad module or the engine over temp sensor which is usually found close to the engine thermostat, which has gone bad. This sensor is telling the engine electrical control that the engine is too hot to be running, so it blows fuses or simply kills fuel and electrical components to avoid a fire or worse. I had a similar problem with an Audi A4 1997 that would let me start my car and go to a near by store etc. driving 10 to 20 minutes. I shop, then get back in car, start the car and back up to leave, and as soon as I enter the street, the engine dies and will not start, leaving me and anyone who will help push my car back into the parking lot after stalling traffic, horns a blowing. Replaced both the over temp sensor and the thermostat for a whole $23.97 and fixed this mind boggling problem once and for all. Hope ths helps.
  • julezA
    julezA - 1987 Mercedes Benz 420SEL - Engine - 3/14/2015
    Engine making clanking noise sounds like it's starving of oil,but oil pressure and oil level shows ok.
    noise starts as soon as the engine gets warm. it does not burn oil. all the on boards instrument are working properly. except for the heater, sometimes it blows hot but most of time just blowing recycled cold air.
     
    0 answer
  • CHIBUIKE ONUOHA
    CHIBUIKE ONUOHA - 1980 Mercedes Benz 280CE - Engine - 3/11/2015
    THE ENGINE IS REVOLVING,BUT IT IS REFUSING TO START
    IT HAPPENS WHEN THE ENGINE IS WARM
     
    0 answer
  • Maryjane
    Maryjane - 2004 Mercedes Benz C240 - Engine - 2/12/2015
    How to change instrument panel that says, I need an oil change
    My son changes my oil. How do I reset so the instrument panel doesn't say I haven't changed the oil.
     
    • Jimm
      2/12/2015 Jimm
      To reset the Service Interval Exceeded warning. Turn on the ignition, use the arrow buttons to pull up the "Service exceeded by XXX miles" warning, and then hold down the cylindrical Reset button on the dash. After 4 seconds it should ask if you would like to reset the service interval
  • F seidl
    F seidl - 2000 Mercedes Benz C230 - Engine - 2/8/2015
    Why did I lose all power and car shut down
    While driving on highway I started to lose battery power. Battery light came on then lights dimmed, radio shut off and car slowed to 20 mph when I shut engine off it would not restart
     
    • Jimm
      2/8/2015 Jimm
      Check the battery and charging system - beginning with the battery cables and connections. Most auto parts stores can test the battery and charging systems for free.
  • F seidl
    F seidl - 2000 Mercedes Benz C230 - Engine - 2/8/2015
    Battery light came on and slowly lost all power until engine shut down
    I have had problem with heat blower not shutting off And car was running rough for a while. I have been pulling fuse for blower so as not to drain battery. Battery is about 4 years old
     
    • Bill
      2/8/2015 Bill
      either a bad alternator or battery in most cases, once the alternator quits the vehicle is powered only by the battery, if battery weak also then you have no cushion as far as time to get where you need to go, In some cases it could also be corroded battery terminals or loose battery terminal clamps,
    • Bill
      2/8/2015 Bill
      I'M SURE YOU HAVE MADE SURE THE FAN BELT HASN'T COME OFF OR BROKE
  • geoph
    geoph - 2004 Mercedes Benz C230 - Engine - 2/5/2015
    My car C230K 2004 model has over heated and in the process we found that the engine block surface is nolonger flat or st
    my car C230K 2004 model has over heated and in the process we found that the engine block surface is nolonger flat or staright. so will it be ok to scheme both the block and the cylinder head?
     
    • Jimm
      2/5/2015 Jimm
      The engine block and cylinder head surfaces will need to be milled / machined to the specified flatness.
  • geoph
    geoph - 2004 Mercedes Benz C230 - Engine - 2/5/2015
    My car C230K 2004 model has over heated and in the process we found that the engine block surface is nolonger flat or st
    my car C230K 2004 model has over heated and in the process we found that the engine block surface is nolonger flat or staright. so will it be ok to scheme both the block and the cylinder head?
     
    • Jimm
      2/5/2015 Jimm
      The engine block and cylinder head surfaces will need to be milled / machined to the specified flatness.