Mercedes-Benz engine repair questions and answers
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1572 Questions
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My ac/heat blower fan won't blow air.Joey B. - 1996 Mercedes Benz S500 - Engine - 8/26/2010My car has 80,000 miles on it. I was told it was probably my blower motor. So I replaced it with the regulator. It made no difference. There is no change in the fan speed when you move the control on the dash from "low" to "high". The ac/heat duel control unit ...-
8/23/2010 darkmindDid you already check the condition of your resistor block (located under your dash beside your blower motor) and the amount of your Freon?
8/25/2010 Joey B.Thanks -
8/25/2010 Joey B.When I put in a different blower motor I also put in a different resistor. I didn't check the amount of Freon, (don't know how) but I do get very cold air that circulates through at higher speeds. Enough to cause condensation on the vents inside the cabin. Would having low Freon prevent the fan from working?
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8/26/2010 darkmindCheck your sight glass I’m not sure where it is located in your vehicle most of it is located in the receiver drier. If you have numerous bubbles in your sight glass when your a/c is on your Freon is low. But if you only see a few bubbles it means you have the right amount of Freon. It will not affect the operation (it will not stop) of your blower fan if your Freon is low.
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8/26/2010 HouseCallAutoThis system has fault codes that can be accessed but by MB only equipment. Sounds like you are describing a bad / stuck blend door actuator on the pass side and a bad blower control module (the fan speeds) but heh, just a guess and my guess could be expensive as hell on a MB. You gotta find a MB tech near you to get out of this.
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My vehicle is locked up. Key won't turn in ignition. Lights won't work.Ted - 2007 Mercedes Benz E350 - Engine - 8/25/201035,000 miles
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8/25/2010 darkmindDid you already try to move (back and forth) the steering wheel while you turn on your key?
8/25/2010 TedYeah, tried that. This car is basically a computer on wheels. It's like the whole thing has shut down. Even the fob can't activate the door locks or trunk.
8/26/2010 AutoMD MemberIs you battery dead ?
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Engine light is on, and car is shaking, i think catalic converter on pass side is broken inside.garry lacombe - 2002 Mercedes Benz E430 - Engine - 8/25/2010
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8/25/2010 darkmindDiagnose first your vehicle with a scan tool to know what is the stored trouble code your engine light indicates. It is possible that your wheel hub bearing is defective that’s why your car is shaking. Replace your broken catalytic converter.
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Gas cap was very difficult to remove-had to use pliers. now can't put it onnorm - 2000 Mercedes Benz E320 - Engine - 8/25/2010the plastic ears won't line up with the metal ones on the cap so you can't install. cap is about 2yrs old from benz dealer.
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8/25/2010 Bobbysomething is wrong with the cap, very simply you'll have to get another new one, I imagine they are pretty expensive from benz so i would bring in your old reciept if you have it and pleed your case for a replacment. Most caps last the life of the vehicel that is obviously a defective cap.
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My car frequently takes 20 seconds or so before it starts, but periodically it starts almost instantly.Chris - 1992 Mercedes Benz 500SEL - Engine - 8/23/2010What is the first part/parts I should address to see if it needs to be replaced? My first thought was Oxygen Sensor and if this is correct, how many Oxygen Sensors does this car have?? Thank you! Chris
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8/23/2010 BobbyStarting has nothing to do with your oxygen sensors. What happens when it takes 20 seconds to start does teh car crank, sounds like it wants to start? or does it do something else?
When was the last time the car had a tune-up new spark plugs and ignition wires? and how old is the battery, this si a common sign that the battery is weak and no longer holding a full 12 volt charge
8/24/2010 Chris... just one month ago installed new spark plugs and wires as well as new battery.
The car turns over beautifully ...just no ignition. So what I have to do is very gradually push on the gas pedal and then it starts.
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What is wrong if I have had my battery charged twice , but then the total car shutdown when driving?Alfonso - 1996 Mercedes Benz E320 - Engine - 8/21/2010
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8/21/2010 Oxidessounds like either a really bad battery or a charging issue, such as a bad alternator or wiring.
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MY 1973 450SLC FEELS LIKE IT IS RUNNING OUT OF GAS SITTING IN TRAFFICSLC - 1980 Mercedes Benz 450SLC - Engine - 8/19/2010150000 MILES? RUNS GREAT IN THE MORNING WHEN WEATHER IS COOL BUT AT NIGHT ON THE WAY HOME SITTING IN TRAFFIC AND OUTSIDE TEMP IS 89-95 DEGREES AFTER ABOUT 20 MIN. STARTS TO STUTTER AND WILL NOT IDLE. THEN STALLS. THEN WILL NOT START UNTIL I RELEASE FUEL PRESSURE ON ...-
8/19/2010 Bobbydefinately sounds like a fuel problem. could be the injectors sticking. Does the car smell rich when it is stalling? It could be that ist is missing because of to much fuel or to little. check the spark plugs to see if they are fouled or show any signs of an issue.
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Car wont start wont turn over at allstephanie mosely - 2004 Mercedes Benz C230 - Engine - 8/19/2010-
8/18/2010 yboy82Did you already check the condition of your battery and its cable and terminal? Battery’s life is 3yrs-5yrs only. You should check your starter relay, consult your owner’s manual to know exactly you can locate it. And if your relay is good you should test your starter motor. -
8/19/2010 MRBHad a simlar situation with my 2000 ml320 turned out to be the crankshaft posistion sensor that I had mercedes replace for me . I would get nothing at all when I turned the key. I luckily got it started and it was like nothing happened . When I took it to Mercedes it died In the parking lot and would do nothing when I turned the key.There was no warning at all when this happened
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I have a lifter sound on the drivers side what are the possible problemsAutoMD Member - 1995 Mercedes Benz S500 - Engine - 8/16/2010i heared it can be a delivery tube or something like that -
I do not have heating/cooling blower(fan) nor ACCleve - 1983 Mercedes Benz 380SEL - Engine - 8/16/2010The engine idles at 1600RPM and I have replaced the 25 amp fuse to no avail?
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8/16/2010 Bobbycheck the blower motor resistor, that could be the problem, also check for power to the blower motor if there is power there at the connector then the blower motor is probably bad.
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Fail ca smog test.hc=247. no=822@25mph. 15 mph is o.k. what is wrong??milton - 1989 Mercedes Benz 300SE - Engine - 8/16/2010
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How do you change the thermostat in a 1993 Mercedes 300SD diesel car? Where is the thermostat located? How much torqueAutoMD Member - 1993 Mercedes Benz 300SD - Engine - 8/14/2010
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I replaced fuel pump, do I nee a fuel pressure regulator?PitViper - 1985 Mercedes Benz 380SE - Engine - 8/14/20101985 380SE. I bought a Holly fuel pump, 120 gph. car has throtle body injection. Is a pressure regulator necessary? Pump came with one, but the instructions say it's for carbureted vehicles.
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8/14/2010 Ladiesman217Then you just got your answer my friend, the instruction says its for carbureted vehicles so if you have the injected type then you don't have to use it.
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Is purge switch-over valve also called vacuum change over valve? mercedes p/n 001-540-86-97.Where is it on a 220C model?MARIO - 1996 Mercedes Benz C220 - Engine - 8/13/2010
