Last post on Apr 04, 2011 at 2:02 PM
You are in the Mercedes-Benz C-Class
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Mercedes-Benz C-Class, Hatchback, Sedan, Wagon
#310 of 886 fuel system problems
Jul 24, 2005 (11:06 pm)
I bought my wife a 2005 C230 Kompressor Sedan w/bells and whistels at the end of November last year as a Christmas present(I offered to buy a new Acura TL or a BMW 330i but this is what she wanted). For the first 3 months the black beauty drove like a dream. Since February it has been getting horrible gas mileage and it would die seconds after a cold start. I told them to check the fuel system and everything that associates with it. I took it to the same dealership that we bought it from. They told us that everything is fine...blah blah blah. After 5 visits from Mercedes of Fife, I took it up to Barrier Mercedes in Bellevue and told them to check out the entire fuel system. They found out that all of the injectors were leaking fuel while it was sitting overnight. Well, it has been almost a month and she's acting up again. I started her up this morning at 11:50am and it started but it bogged down...almost died...then it got the correct mixture. I immediately ran back to the exhaust to see what it smells like, and from past experience it smelled of pure gasoline!!!!!!!!!! I know I am not the only one having this problem. I'm calling MBUSA tomorrow and I am either getting a new car or a new engine!!!! I use Chevron Techron 92 Octane only, 300+ ASL, 60-75 average outside temp in south king county Washington. Would like to know if anybody else is having the same problem. I have worked on American, Japenese, and Euro cars for over 7 years and I would like to hear if anybody else is having the same problem with the same year and model.
#311 of 886 check engine light, air mass flow sensor, C230
Jul 27, 2005 (11:56 am)
I have a C230, 97. My check engine light has been on for about three years now, at first going randomly on and off. A dealership told me it's the air mass flow sensor, but the car has no typical symptoms like stalling, vibration or hesitation. Moreover, it passed the yearly emissions inspection twice with exaust results way below norm. So I never bothered, and the car runs and starts fine.
This year in New York you can't pass inspection with that light on. The dealership wants $900 to change the air mass flow sensor, yet they say the light could be caused by something else, in the absence of typical symptoms.
Any ideas about how to deal with such situation?
#312 of 886 Re: check engine light, air mass flow sensor, C230 [alfed]
Jul 27, 2005 (1:37 pm)
Get a new and correct diagnosis - get a dealer to connect to your OBD system and read the codes. If it isn't the MAF sensor, what's the point? You have to know what's going on, and that's what the diagnostic codes are for. No one on this board can help you without knowing the real problem - there are literally dozens of possible causes for a CEL - the initial diagnosis might have been right, but before spending that kind of money, I would check.
Also, look in your phonebook for independent MB shops - the dealer is always the high-priced spread, and not always necessary if the car is out of warranty.
#313 of 886 C230 Coupe Sunroof Buffeting
Jul 28, 2005 (5:53 am)
Just bought it - a 2004 with the great roof, but at city speeds at least, when fully open, we get an awful buffeting inside the car - it lessens as you close the roof to say, half way - but this seems a waste of "air" -- any advice on this?
#314 of 886 Re: C230 Coupe Sunroof Buffeting [stumacp]
Jul 28, 2005 (6:55 am)
Does it have the tiny deflector at the leading edge of the roof. I would be a small piece that is on the part of the roof that pops up when open, that's the 'front deflector' for lack of a better term.
This small part redirects the airflow just a bit but was introduced on later models due to the buffeting concerns. You could speak to the dealer if it's not there and maybe they can attach one.
Another option is to just crack the side windows an inch or so as that relieves the pressure inside and cuts down on the 'booming' sensation.
#315 of 886 Re: check engine light, air mass flow sensor, C230 [jrct9454]
Jul 28, 2005 (7:43 am)
Thank you very much, it sounds very logical. I'll go and get a printout before doing anything else. Do they normally include diagnostics in the repair price or is it a separate item?
#316 of 886 Re: check engine light, air mass flow sensor, C230 [alfed]
Jul 28, 2005 (8:59 am)
Depends on the shop, but most places are going to charge you once to diagnose, and separately to fix. Sigh...
#317 of 886 Re: C230 Coupe Sunroof Buffeting [rowlandj]
Jul 28, 2005 (9:29 am)
Thanks for this -- no, the leading edge is flat -- i take it the thing is just a small sort of "ramp" thing? do you think it's available as an add-on? And yes, you are right - cracking the window does help, but then the noise is a factor -- call me fussy, but well, you know what i mean. If you know of how to get the little deflector i would be grateful -- thanks again.
#318 of 886 Re: C230 Coupe Sunroof Buffeting [rowlandj]
Jul 28, 2005 (9:35 am)
another thought on this -- there is a deflector that pops up when the roof panel slides back -- i'm not sure if you mean that piece -- it is about 4 inches wide -- and obviously deflects some air upwards -- when you said "tiny" i figured you meant just that - but clearly, the thing that they have provided on the car is not deflecting sufficiently. do you mean an additional item to the one that is there on mine? Sorry to be obsessing on this -- but your note got me going!!
#319 of 886 Re: C230 Coupe Sunroof Buffeting [stumacp]
Jul 28, 2005 (9:48 am)
It is quiet literally a small hump and it's different from the one's you describe that pops-up. Even with the roof closed you'll see it. Picture a small comb laying on it's side just ahead of where the roof meets that pop-up piece. It is right in the middle and about 6 inches long and about 1/2 inch high, not much but enough to make a difference.
You could try just putting your fist at that point just sticking out of the roof when open to simulate the effect that piece has.
I don't know if the dealer can retro-fit this piece under some TSB but it looks to me like it would require a change of the part that pops-up because it's part of the trim of that part. There could be an add-on they developed for the older cars that glues on (like a spoiler). It would be worth asking.