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Mercedes-Benz engine repair questions and answers

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  • mahmoud
     
    • MOONSTER_TOOLZ
      11/3/2010 MOONSTER_TOOLZ
      Are you trying to say that you've replaced the water pump and after the engine run, the temperature gauge is not working? Locate your fuse box that contain the fuse of your temperature gauge; it might be in the engine compartment, under the dashboard in the driver's side or under the back passenger seat. Inspect the condition of the fuse and replace it if necessary. Also it is possible that the temp sensor is failing or the connector is loose or detached; inspect and rectify it.
  • lesli
     
    • Bobby
      11/2/2010 Bobby
      an engine diagram, probably not your best bet would be to find someone who has one and have them email you it. Repairs manuals can have an engine diagram. what exactly do you need the diagram for?
    • Mikhelin
      11/2/2010 Mikhelin
      What kind Diagram do you look for? there is many of them. What part of engines, Electrical or Mechanical, Fuel, Air control? Or both? Internet may have some free MB diagram on website, if you're good on Internet. If you want ALL diagrams, Order to get Mercedes Benz Repair Guide $500.00 or CD Drive available for $150.00. You can't mooch a good one. Ask Santa Claus.
      Mikhelin
      11/3/2010 lesli
      sorry if you took my words for a cheap way out Your right nothing in life is free accept advice thanks anyway mikhelin
      Mikhelin
      12/2/2010 Mikhelin
      Thank you, I tried to help you. We have no choice becuz of America, The better is always more money.
  • Rd
    Rd - 1991 Mercedes Benz 300SL - Engine - 11/2/2010
    Replaced two hoses recently. Heater hose with bulge and small hose under oil filter. Have to occasionally add water.
    Car seems to need radiator water since and before the maintenance above. Have pressure tested it with no leaks to be found. No water leaking into engine either. It is an older car and I have had it for about 3 1/2 years and it never need water on a regular basis ...
     
    0 answer
  • patel
    patel - 2000 Mercedes Benz ML430 - Engine - 11/2/2010
    Air flow control sensor problem. Replaced it but still same problem. stalled on stop signal and idle low.
    replaced air mass flow conrol sensor but problem is still remains same. stall at stop sign and idle speed is low and stall on stop sign.
     
    • CARLOSSILVA
      10/30/2010 CARLOSSILVA
      DO YOU HAVE FAULT CODES?/
    • Mikhelin
      11/2/2010 Mikhelin
      replace Idle valve and PVC, moreover Cold Start Valve, plus replace Mass Air Sensor. do it all once to get you off problem. Are you buying original BOSCH OEM Mass Flow? I doubt, becuz its not working with other brand X, becuz thus will conflict into your main control computer system. Germans did this purposely stop you from buying other brand X, Enroute in lacking computer system. Dont keep stubborn to fix different, it will hurt the engine and will ship to salvage yard. And Germans will be a lot happy for you to buy new Mercedes Benz.
  • wanda
     
    • CARLOSSILVA
      10/30/2010 CARLOSSILVA
      WHAT SENSOR??
    • Mikhelin
      11/2/2010 Mikhelin
      Mercedes Benz is designed almost like air craft engines..there is many sensors, that's why Benz is a lot better than any America cars. Sensors and Valves are very important to replace after 100k miles to make your car worry free next 100k. I will say cost you to replace all of those sensor and valve devices would cost from $1200 to $1500. worth to last next 100k miles or more if you re smart.
  • walter lopez
    walter lopez - 2001 Mercedes Benz ML430 - Engine - 11/2/2010
    Hello..my MB 430 '01 turns off itself after a few minutes (3 to 5) and it won't turn on again till cools off
    my truck is 135K happens when the truck is stopped
     
    • CARLOSSILVA
      10/30/2010 CARLOSSILVA
      NEED A CRANK SENSOR
    • Mikhelin
      11/2/2010 Mikhelin
      ERG and Idle valves..and check with air control valve and vacuum valve. clear Mass Air Flow Valve.
  • lonnie
    lonnie - 1994 Mercedes Benz S500 - Engine - 11/2/2010
    Check engine light is on
     
    • yboy82
      11/1/2010 yboy82
      You should diagnose your vehicle with a scan tool to know/determine the stored trouble code in your vehicle since your check engine light is on. The extracted trouble code will help you identify the fault of your vehicle’s problem.
      yboy82
      11/1/2010 yboy82
      You can visit this link to have an idea how to troubleshoot your check engine light http://www.automd.com/.../

    • Mikhelin
      11/2/2010 Mikhelin
      you need to scan the problem..go to the dealership rather be.
  • tommy
     
    • Nissan Technical Advisor
      What you mean here is that you're pressing hard the acceleration pedal, but the output speed is not desirable? Usually the causes of this are; the fuel filter is blocked as well as the air filter, the ignition timing is incorrect, uneven or low cylinder compressions, the fuel injectors are blocked, the brakes are binding and a low fuel pump delivery.
    • Mikhelin
      11/2/2010 Mikhelin
      look in transmission sensor...Its in all about Transmission. You mentioned the engine is strong but weak speed, common to blame in drive train. don't keep drive too long..it will explode transmission. i hope you have a lot of money to afford.
  • Mr Phixitt
    Mr Phixitt - 2000 Mercedes Benz ML430 - Engine - 10/30/2010
    Where is Bank 2 Sensor 2 Oxygen sensor
     
  • julius olokose
    julius olokose - 1999 Mercedes Benz ML430 - Engine - 10/30/2010
    My runs for about 20minutes then engine stalled for about 2hours before it start again
     
  • Kat
    Kat - 2001 Mercedes Benz CLK320 - Engine - 10/30/2010
    Heater fan not working on it's own
    Fan will run when manually turned (to get it started), with your hand for the time the car is running. Will not go on it's own after car restart. Temp works if I select the defrosters but no fan. The recycle button is on and I cannot select any other. Check engine ...
     
    • yboy82
      10/14/2010 yboy82
      The repair manual for your vehicle is hard to find. Did you already check the eBay or http://www.alldatadiy.com/about_alldata/index.html You can also use the Find a Shop feature of AutoMD to see a list of shops near you with their address, telephone # and labor rate per hour. You can call them and inquire how much for a replacement of a heater motor/blower.
      yboy82
      10/15/2010 Kat
      Thank you for your suggestions. Lots of manauls out there just not too many of 2001. I did find an electronic manual on E-Bay for under $25. I think I will have to go that route but I really wanted the old fashioned paper type. Can't see spending the $175. - $225. for one tho.

      Does anyone have an inkling of anything other than heater motor/blower, or is that pretty much the general concensus.

      Thank you much. Have a wonderfully good autumn day!
      Kat
    • Mikhelin
      10/28/2010 Mikhelin
      Heater Unit is very expensive, I would blame to Climate Control Unit to be replaced. . Your model 2001, I doubt the Heater Unit cause problem. Most common problem with Climate Control Unit. Most drift mechanics use his cross fingers to try to install both units one or other and charge you both. You must visit Benz Dealership to trust this equipment problems.
    • CARLOSSILVA
      10/30/2010 CARLOSSILVA
      YOU NEED TO REPLACED THE BLOWER REGULATOR FIRST,THAT WILL RESOLVE THE PROBLEM,DONT REPLACE THE BLOWER MOTOR YET
  • Drainpro
    Drainpro - 1998 Mercedes Benz ML320 - Engine - 10/30/2010
    I got several misfire codes and when I push on the gas pedal the car acts like its misfirng and stumbles. What now?
    I had changed the sparkplugs earlier and after I did this is when it seems this started happening. I checked all the connections, boots etc.. I checked fuel pressure at idle that was good. When I clear the codes they clear then comeback. After a while the car stalls ...
     
    • CARLOSSILVA
      10/30/2010 CARLOSSILVA
      WHAT FAULT CODES DOES IF MISSFIRE IS RANDOM OR ITS ALWAYS SAME CYLINDER??
    • cee
      10/30/2010 cee
      what does 1p0325 means for a 1999 isuzu oisis
  • Greg
    Greg - 2000 Mercedes Benz ML320 - Engine - 10/30/2010
    What would be the next steps to resolve my A/C problem?
    When turning on the A/C the air that comes out is warm or hot never cold. I have checked the A/C unit and the hoses from the compressor have a temp of 20 degrees when the unit is on. The freon has been checked and the unit is full and operating as it is supposed ...
     
    • CARLOSSILVA
      10/30/2010 CARLOSSILVA
      THE IS NO WATER SHUT OFF,ITS A BLEND AIR DOOR,TOO HARD FOR THE AVERAGE PERSON.
  • zmsn7u
     
    • Ryan D
      10/14/2010 Ryan D
      More than likely, it is a fuel pump or fuel pump relay. Common problem
    • Mikhelin
      10/28/2010 Mikhelin
      You need Idle Valve job. If you don't proper schedule maintain as owner's manual specification , that's how all equipments got clogging and conflicting. Idle Valve cost 200 to 300 somewhere.
    • CARLOSSILVA
      10/30/2010 CARLOSSILVA
      YOU NEED A CRANKSHAFT POSITION SENSOR 100% GUARANTEED
  • Peter Lim
    Peter Lim - 1995 Mercedes Benz C220 - Engine - 10/29/2010
    Engine won't run well when it is cold.
    engine cold start, press accelerator, engine intake back fire and won't accelerate, exhaust smell fuel, need to warm and runs well when engine is warm. replaced new fuel pump & filter. Is it fuel injector problem?
     
    • Nissan Technical Advisor
      There are many possible reasons why engine is hard to start when it's cold, especially during cold seasons and places where cold weather is a normal temperature. One of these reasons can be based on the effect which cold has on liquids evaporation. When it is cold, gasoline evaporates less and this cause it to be more difficult to burn due to the fact that it is burnt when it is evaporated. Another reason by which a cold engine might have problems to start is caused by the fact that oil becomes much thicker in cold than the way it is in hot, making partial restrictions to the engine parts. Another fact, batteries pass through chemical reactions which loose agility while being cold and therefore, in such circumstances, batteries don't function properly. I recommend trying to use lighter oil, like synthetic oil and a low octane fuel for easy burning.


    • Mikhelin
      10/29/2010 Mikhelin
      There is most problem with all Valve Units. A lot of owners didnt follow factory specifications to maintain terms of time cycle. You need to replace all Valves, Cold Start Valve, Idle Valve, PVC Valve, and Oxygen Sensor. You cant keep fixing one at a time other different awaiting to failure. Replace whole Valve units at once. Recommending to fill up high Octane 94 gasoline for 3 months, and high Octane Booster can every 10 gallons gas for 3 months. Thus will clean out all fuel injectors moreover other failure details fixed. Valve Units are big cash to buy, you do not want to be greedy, or buying a Ford Pinto. Synthetic Oil by Mobile One is very good, But make certain all of gaskets are good firm tighten, becuz this oil is very thin to escape when hot pressure around gaskets. Cheap thicker slick oil is good for summer 90s but harder to start when cold, if this car is old with poorly maintain cycle time.