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Mercedes-Benz engine repair questions and answers

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  • tee94MBNZE20
    tee94MBNZE20 - 1994 Mercedes Benz E320 - Engine - 9/21/2014
    I have replaced fuel pump, crankshaft position sensor, etc. and my car still will not start. Help???
    Car will turn over but not crank.
     
    0 answer
  • PC
    PC - 1995 Mercedes Benz S320 - Engine - 9/9/2014
    After driving my car for about an hour, when I turn it off, I have to wait about an hour before it will start again
    Once the car starts , it runs fine. I caint figure out what is causing this delay in starting. When inturn the key, there is no sound. This has happen on 3 different occasions. The starter, alternator, and battery checks out This started after I drove through ...
     
    • AutoMD Member
      9/9/2014 AutoMD Member
      You'd better use a professional person Benz diagnostic tool, so relatively safe, of course, if you believe that you can solve the problem yourself, or consult a professional mechanic.MB SD Connect Compact 4 support reading out & erasing trouble code,reading the real-time data of sensor and actuator, coding and programming. Also support wireless diagnose, support K line,CAN BUS and UDS protocol, with multi-language.hope it is helpful to you. http://www.uobd2.net/.../...3-03-version.html
  • tee94MBNZE20
    tee94MBNZE20 - 1994 Mercedes Benz E320 - Engine - 9/5/2014
    What would cause my car to shut down while driving? and now it won't start,
    Driving at about 55 mph, car cut off. Would not restart. Could this be the fuel pump?
     
    • Alex Merlin
      9/5/2014 Alex Merlin
      You'd better use the BENZ diagnostic tool to diagnose if you are sure that you can solve it by yourself, or you can also consult a professional mechanic. The MB STAR system, when it made its debut, was much more capable because it was PC-based (IBM T30 laptop), but it was also very versatile

      because it incorporated a HHT emulation mode (for backward compatibility) along with a "multiplexer" intermediate unit between the PC and the car,

      which allowed the connection of a variety of different diagnostic connection cables, depending on which diagnostic system the car in question happened

      to use. For the oldest cars (i.e. the C126, early R129 SL models, early W124s and W140s, etc.) a "four-pin" diagnostic cable was provided. For second-

      generation cars, such as the E500E, 400E/E420, middle and later R129s, middle and later W140s, the familiar "38-pin" plug is provided. There are also

      OBD-2 interface cables for model year 1996 and later cars, as well as a 14-pin cable for European diagnostic systems. All of these cables allow the

      combination of the MB STAR with the in-line multiplexer unit to fully interface with any particular car's computers.The below website may be helpful for you to find the tool. hope it is helpful to you. http://www.plusobd.com/.../...gnostic-tool.html
  • tee94MBNZE20
    tee94MBNZE20 - 1994 Mercedes Benz E320 - Engine - 9/2/2014
    What would cause my car to shut down while driving? and now it won't start,
    Driving at about 55 mph, car cut off. Would not restart. Could this be the fuel pump?
     
    0 answer
  • PC
    PC - 1995 Mercedes Benz S320 - Engine - 9/1/2014
    How do you replace the crank shaft position sensor on a 1995 Mercedes Benz S320?
    My1995 Mercedes Benz S320 does not start after driving for about an hour. Once the car sits for about 35 minutes it start right up. A friend told me that the problem is the crank shaft position sensor
     
    • AutoMD Member
      9/1/2014 AutoMD Member
      You can use the MB SD C4 to diagnose the problem´╝îMB SD Connect Compact 4 support reading out & erasing trouble code,reading the real-time data of sensor and actuator, coding and programming. Also support wireless diagnose, support K line,CAN BUS and UDS protocol, with multi-language.
  • clampman
    clampman - 1981 Mercedes Benz 300SD - Engine - 8/23/2014
    Looking to swap motors
    will the motor from the 1981 300sd fit into a 1977 300d non turbo
     
    0 answer
  • Jerry
    Jerry - 1989 Mercedes Benz 560SL - Engine - 8/22/2014
    The idiot light left of the ABS indicator light comes on why? It is not marked.
    This light come on for a few seconds and then goes off. It does that all the time. Any ideas?
     
    0 answer
  • dreamstomorrow
    dreamstomorrow - 2000 Mercedes Benz S500 - Engine - 8/18/2014
    Key wont turn in ignition do I need a new key or a new ignition?
    used the car 15 minutes prior to this occurring went to put smart key in ignition and wont turn. battery isn't dead and don't know whether or not this means I just need a new key or whether or not the whole ignition/modulator might need to be replaced... now I don't ...
     
    • AutoMD Member
      8/18/2014 AutoMD Member
      if there two problem: 1. the eis is borken, for this, you need to go your local workshop to repair it
      2. there is problem of keys, you can reprogram a new key
  • AutoMD Member
    AutoMD Member - 2002 Mercedes Benz C240 - Engine - 8/9/2014
    How many miles will a mercedes get if car is maintained?
    I'm considering buying 2002 c class with 100,000 miles. I understand these cars can maintain over 180,000 mikes on them if engine is maintained. Is that close to correct? Bill
     
    • Jimm
      8/9/2014 Jimm
      Actual mileage and service life will vary - in addition the actual service life realized is also dependent upon the specific maintenance performed / completed on the vehicle since day one.

      Generally, if you have been provided all the service history / maintenance records for the first 100k miles and follow the recommended maintenance schedule you will maximize the life of the vehicle. Recognize there are no such guarantees.
  • AutoMD Member
    AutoMD Member - 2002 Mercedes Benz C240 - Engine - 8/7/2014
    Engine life, if well maitained
    Do these cars actually last for over 180,000 miles if engine is maintained?
     
    • CVO
      8/7/2014 CVO
      It's a Mercedes Benz, it built to last.
  • AutoMD Member
    AutoMD Member - 1998 Mercedes Benz E430 - Engine - 8/3/2014
    Car running hot have put new radiator
    the car was gave to me and it had been parked for a while but when i start it up it runs hot
     
    • CVO
      8/3/2014 CVO
      A low coolant level, a coolant leak (through internal or external leaks), poor heat conductivity inside the engine because of accumulated deposits in the water jackets, a defective thermostat that doesn't open, poor airflow through the radiator, a slipping fan clutch, an inoperative electric cooling fan, a collapsed lower radiator hose, an eroded or loose water pump impeller, or even a defective radiator cap.
  • AutoMD Member
    AutoMD Member - 1997 Mercedes Benz S500 - Engine - 8/2/2014
    Do I need to reprogram new ignition switch
    Old switch has short replaced it with exact part. All lights come on dash and turns over. Put old one back in jiggle it and can get it to start but that's why I replaced it because of short. New one fits snug and everything works but no start.
     
    0 answer
  • AutoMD Member
    AutoMD Member - 2004 Mercedes Benz CLK320 - Engine - 8/2/2014
    Air Conditioner would shut down after 10 minutes and no air
    the other day I went to use it and after 10 minutes or so a strong order and smoke was coming through the Vents. I shut down the A/C and was able to continue the trip. Could it be the heater core or the A/C. Thank you, htmiller1940@yahoo.com
     
    • CVO
      8/2/2014 CVO
      A broken heater core is the cause of this problem.
  • AutoMD Member
    AutoMD Member - 1981 Mercedes Benz 380SL - Engine - 7/29/2014
    Like to know where is the EGR valve located??
    any leak on the valva can cause the motor lose the power??
     
    0 answer
  • AutoMD Member
    AutoMD Member - 1990 Mercedes Benz 500SL - Engine - 7/26/2014
    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
     
    • Jimm
      7/26/2014 Jimm
      First, double check that the correct length and part number serpentine drive belt is installed; should be - Gates part # K060994, Dayco part # 5060990 - or equivalent.

      Next, unless the belt tensioner is new or has been recently replaced - it is a good idea to replace the belt tensioner at the same time as the serpentine drive belt.

      The parts are readily available from these many on-line sources, www.partsgeek.com, www.rockauto.com, www.discountautoparts.com, www.autopartswarehouse.com, www.jcwhitney.com - to list only a few possibilities.
      In fact, they (RockAuto) list the serpentine drive belt from around $9.60, and the belt tensioner from around $56.70 for your vehicle.