Top 20
2004 Mercedes-Benz C-Class Questions & Answers
Very low gas mileage in C240
run the fault codes
indicators are that the heated oxygen sensor ( in the exhaust manifold before the cat converter ) is malfunctioning and not reporting the exhaust gas composition correctly so that the ECM can adjust the mixture
other codes that may show up are the ambient air temp sensor , The BARO sensor and MAF/VAF sensors all of which report to the ECM to keep the air /fuel mixture correct
12/12/2017 6:06:03 PM •
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207 views • 0 helpful votes
Oil and water mixing 2004 m benz c200engine oil in
unlikely to be engine oil, more likely transmission oil from faulty transmission oil cooler in radiator tank
take it in for a proper diagnosis and quote
the coolant system will have to be properly and completely flushed
10/24/2016 10:31:37 PM •
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93 views • 1 helpful votes
Key wont turn or release the steering wheel
I'm not familiar with the Mercedes, but first of all, NEVER turn your wheels all the way, it'll cause damage sooner or later, you kind of found this out already. Next, try getting to the fuse center under the dash and probably under the hood of the car, check all your fuses with a digital volt meter, replace any that are bad.
Your last statement is "won't start" does the engine spin? or nothing at all happens when you turn the key? If your sure the battery connections are all tight and clean the next step I would do is plug an OBD II scanner in and get any codes that have popped up in your computer, if there aren't any, then my next suggestion would be to start checking into the ignition system, If you forced you key to turn in anyway when you had your wheels locked to the side, you could have damaged the electro-mechanical components in the steering column.
7/19/2016 9:56:53 AM •
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77 views • 0 helpful votes
Merc C Class safety belt warrning - ENABLE !
Unfortunately, you need to get it scanned. Merc. charge for this + labour in the UK.
i had a problem with an old SLK and found the software onFleaBay, it worked out cheaper for me.
Check out the Merc forums on line, very helpful.
it could well be a sensor, modern cars eh!
8/7/2015 5:02:53 PM •
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382 views • 0 helpful votes
Take off the fender
normally held on with a number of bolts a row under the bonnet some behind the door when you open door you will see 1 then there will be 1 at the rear bottom of the wing under some trim and there will be 1 either behind the indicator light or behind the bumper
2/17/2015 8:56:04 PM •
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99 views • 0 helpful votes
While driving, when i go over a bump, why does the shifter move up?
I am not certain if you mean actually moves forward, as in out of gear, kind of rattles with movement or the shifter knob itself is moving up and down. I am a former Mercedes Benz Tech and have worked with many of those shifters in various MB classes. If you provide a better description, I will be able to help you.
If the shifter has excessive play in it, there is a grommet that connects the shifter to the linkage to the transmission that wears out and will cause a light rattle sound and play in the shifter. Again without a better description, it is difficult to help you.
7/3/2014 1:53:28 PM •
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92 views • 0 helpful votes
I own a 1995 E420 and it's been having some really
That is the 119 V8 and a very good engine. Chances are it needs a tune-up. If I remember correctly, it uses copper spark plugs so you don't get the same amount of mileage out of them as you would platinum or iridium spark plugs, Also the caps & rotors are notorious for going bad and will sometimes cause problems in wet weather and when the engine is at operating temperature in Summer weather. The wires are also a another trouble area. It is a rather pricey tune-up because to do it properly, you should replace the plugs, wires, both caps and both rotors. As for the burning oil, that means there is probably an oil leak above the exhaust manifolds. You probably have leaking valve cover gaskets. They like to leak in the back where there are 2 humps in the gasket. Try and get a latex or Nitrile pair of gloves and run your fingers across the back and see if there is fresh oil back there just below the valve cover.
8/27/2013 9:17:41 PM •
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60 views • 1 helpful votes
Soot / smoke accumulates on front rims
Nothing to do with fuel economy my friend,but that black soot is brake dust from your front pads.THAT's whats doing MOST of your braking.The front.YOUR problem,believe meit is YOU,is the fact that you do not use the emergency brake ever.Each time you put that emergency brake on,it adjusts the rear brake up a bit more,until eventually you have even braking force all around.Use the emergency brake EVERY time you park the car and get out.Eventually you'll notice that the black soot is minimal,but it will always be there a bit.Just keep the rear brakes adjusted up by using the e-brake a lot when stopped.That's also why the front pads ALWAYS wear out and back are still fine.NO emergency brake use.Rigger
8/28/2012 9:28:55 PM •
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1,016 views • 0 helpful votes
2003 mercedez c320 engine light and error code 005
MB fault codes @ 005 "Engine coolant temperature sensor
intermittent connection." It must be some loose connection somewhere. Check the
fuses, relays or worse you may have a fried wiring harness, very common with MB's.
10/3/2012 4:45:46 PM •
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232 views • 1 helpful votes
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