ok.....so i took my car to smythe european on stevens creek here in san jose for cylinder 5 missfiring......they said its the wire and spark plugs and they are gong to replace it and problem will be fixed...i said alright go ahead and do the job and let me know when its done....so they called me the next day saying my car is ready to go and is fixed....i said ok....went there picked it up drove it home when check engine light came back up....i got my obd2 reader and checked waht the **** is was....same thing cylinder 5 missfire....so i was like wtf.....$550 for nothing and they haven't fixed my issue....so i went back to them....they said they'll take it look at it...now they're telling me it will be another $700+ they have to change all spark plug wires....and spark plugs again....im stuck on what to do....i dont wanna spend this money on this MOTHER ****ING CAR THESE STUPID MOTHA FUKAZ CAN'T FIX AM I GETTING RIPPED OFF SO I JUST GO THERE AND SPEND ALL MY MONEY I WORK HARD FOR OR WHAT....SOMEONE HELP ME IM STUCK I DONT KNOW WAHT TO DO...THESE MOTHER ****ERS ARE LIERS AND I HATE THEM SO MUCH I HATE MERCEDES WITH A PASSION...IM NOT HAPPY WITH THE CAR AND I WANT IT RUNNING LIKE IT WAS...IM NOT SPENDING NO MONEY ON THIS CRAPPY AS C240 I WISH I HAD A BOUGHT A HONDA INSTEAD....SOMEONE TELL ME WHAT THE *** THE PROBLEM IS....I WENT TO 3 DIFFERENT SHOPS AND THEY ALL TELL ME DIFFERENT....SOMEONE WHO KNOWS BENZ BY HEART HELP ME OUT BEFORE I EAT THE ENGINE WITH MY FORK AND KNIFE FOR DINNER......................BENZ SUCKSSSSSSSSSSS

 

My guess is the coil for that cylinder. I find it hard to believe that they replaced one spark plug the first time. What does the invoice say for the work that was done?

 

+1 - This is very simple & easily checked. Coilpack is suspect - All you have to do is swap that coil pack & wires with another cylinder & see if the misfire moves cylinder with that change. Your dealer sounds like an idiot. What mileage has the car done? We have talked many members through this cheap DIY fix - Mark the coil packs before changing with a felt pen.

 

I've found that before I take my car in for any sort of work that if I check on this board I can narrow the problem down. I would never just blindly accept what any mechanic told me without doing my own research. This does indeed sound like a coil pack. It's my understanding that the 2.6L engine in the C240s is one strong engine. I doubt it's something serious.

 

i first swapped coil pack and it wasn't coil pack......i bought a new one just to make sure it was but iwasnt...now i went back to deal they spent 3days looking at it and finally came to conclusion that i need new spark plug wires and plugs.........they wanna charge me 749$ but i said **** that and **** the benz who made it.........i got all the parts for 250$ i save almost $500 and im going to change it myself.........









alsoo anyone else having issues like me? when i drive my car slow it runs great...when i accelerate and press the gas all the way check engine light goes on...my local dealer did all kinds of testing to really locate the problem of it and that was it what i wrote up top..........

 

C-CLASS MERCEDES TO ME REALLY DISSAPOINTED ME I HAVE SPENT ALOT OF MONEY INTO THIS CAR!!!!!!!!! ALWAYS PROBLEMS MOTHER ****KKKKKKKKKKERSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS S AND THEIR BENZEZZZZZZ

 

Same #5 cylinder code? What DID they do the first time? What does the invoice say?

 

ssounds like a crook just trying to get more money out of you. I say ask for a refund or if you paid by credit card issue charge back and get your money back.

I say PM gramma_benz. I believe he knows a trusty mechanic in the bay area.

 

only thing i didnt like about the bay area was that all the mechanics over charged for labor. they were charging more then some doctors per hr.

 

I find your lack of faith disturbing.

All joking aside, was it raining?
I wonder if the windshield drain on the driver's side wasn't connected properly
allowing water to pour on the rear corner of the block...

 

im guessing spark plug cables and plugs......and i recently bought platinum 4 bosch spark plugs now i gotta take those out and put new ones along with cables is this is or do i not need new spark plugs?

 

they changed the spark plug wire on cyl 5...that was it same problem after few weeks later...missfire i was like wtff.......

 

i think it stems from not using dielectric grease on the spark plugs or coil packs. C230_sport coupe has a thread about it here.

 

here's the link

https://mbworld.org/forums/c-class-w...ark-plugs.html

 

Get rid of the +4s.
I freely admit I tried to cheap out with them also... however my car's performance suffered severely... perhaps I'm too sensitive to everything...
Purchase the correct OEM Bosch plugs (maybe wires too - you still haven't stated how many miles are racked up...) from www.autohausaz.com.
If you're doing this yourself, do it with the engine cold, and always start plugs
or bolts whatever by hand, and make sure the wire is re-seated properly on
the plug (it makes a very audible CLICK). Do you have the 17mm crowfoot wrench?

 

And they charged you $550 to change one spark plug wire Let's see....you've changed the plug wire, and the coil for that cylinder, but not the plug yet? Change the plugs. Buy the OEM plugs, they're worth the extra money. If that still doesn't do it then I would suspect the injector on that cylinder if you still get the missfire. First check the wiring going to the injector.

 

I had a similar problem with my 2003 C240. Stepped on the gas and the engine seemed to sputter and lose power. This happend twice. Both times they replaced the catalytic converter (actually one side the first time, the other the second). They told me it was because gas was leaking from the spark plugs into the converters. The changed the spark plugs the last time and I've not had any problems. It was eExpensive though.

 

This sounds like a crock of bull**** story as well.

Fit OEM Bosch plugs, coilpack & twin leads on that cylinder ONLY & see what happens. If the problem returns - Check injector - Mleskovar is spot on track.

Once the problem is solved you can replace the rest of the plugs etc. Don't pay that dealer. Don't go back to those robbers. Don't blame the car.

What year is the car and what mileage has it done? How well has it been maintained?

 

the car is 2001 with 92k miles on there....i did have tranny problems and had the tranny taken out and new one put in there at 66k miles.....they car is well maintained....like i said i dont race the car and dont intend but sometimes you have to step on the gas to get thru the red light...and that's where the problems start.......now today i've cahnged the spark plug cables......still with the platinum 4 plugs.....im going on a ride later and will see what happens...if it shows up or not if not them thanks to me and i deserve a cookie/........

 

I'm afraid that 2001 was not a good year for the W203. They still had wrinkles to iron out. If it's any consolation. The C240 was probably the most reliable of the bunch because the engine & transmission were tried & proven.

My car has had 2 caster bushes - not because they had failed but because I knew they had been improved & one 5 cent tranny plug washer due to a slight oil weep on the drain plug - otherwise perfect.

I know of one in Malaysia at 700,000 Kms & still no major repair and an E240 at out office that has done 563,000 Km as of yesterday & still going strong.

 

Who's your service advisor, out of curiosity?
I found Smyth to be complete morons when it comes to almost ANYTHING.
I would get a call to pick up my car (~ 1 hour each way from the SC mountains)
only to arrive and find the job done shoddily, and new problems.

I would make the SA come out and sit in the car with me, and inspect stuff, well at least the 1st few times.
Then, after having them send me home without the car several times to fix either the same problem, or a new one they created,
I started making my SA act an inspector, that when the shop said 'it's ready', he'd check everything out, and often would then call back again and say 'don't come'.
Luckily for me it was all under warranty.
I can say, that they charge 2x-3x the MSRP on parts prices....no sheet.
I bought clear fog lenses online, for like 15, it said 20 msrp.
I ended up ordering one wrong pn, it wasn't clear.
Price to get the right one without waiting, $40 from Smyth.

I order most of my parts from dealerships in Florida and it's cheaper even with shipping than buying local.
You know, it's not even owned by anyone named Smyth, it's part of Autonation.
Funny, but I MET Mr. Smyth recently, nice guy. He was out from NY, and gets his hair cut the same place I do. They should take down his name.
Here's one such place.
http://www.trademotion.com/partlocat...?siteid=214089
Also parts.com but I'm afraid to recommend them since they are like a referal company not an actual dealership. It's wierd. I bought a large shipment from them recently, and it went ok mostly, but
wow, it's a shady contract you end up agreeing to.

I'm PM'ing you some info that might help in the future dealing with these nitwits.
You're really better of doing stuff yourself if can manage it. Likely you can do a better job than they can.

I know a good independent shop in Scotts Valley if you want to know the name, let me know.

If it WAS a wire, again you could switch it, and the problem would follow.
Does the 2.6 have 2 spark plugs per cylinder? (and 2 wires, and 2 coils?)
Swap both of each from another cylinder and see if the problem moves.

Also pull the #5 spark plug(s) and see if they actually changed the plug.
Maybe they didn't. It's been known to happen with these stealers to do crap like that.

 

thanks alt for the info i appriciate your help so i got the problem fixed...bought spark plug wires with 1k on them...and they work better and my car is running smoother than it was no more shaking no check engine...so i hope it stays that way...for now...

 

Either i'm very lucky or you're not lucky at all. I've had mine for nearly 3 years and it has almost 103k on it. I've had virtually no problems at all.

 

I can understand your pain about these MBs ..... I also thought, to get rid of this C180 and get another BMW (which in my opinion are the best ones) My BMW 520i is the best car I bought so far.

But then again, it's a way to learn more about cars, by just doing researches and try to do the job yourself. I've learned ALOT !!! I can replace the filters ,plugs, oils....And I'm only a musician.

 

Now yer talkin'.
It was funny, I replaced a leaky exhaust manifold gasket,
and while I was at it, lots of basic things, and threw in a new Supercharger and rebuilt the alternator while i was at it.
My neighbor saw me, and said 'wow, I didn't think you're supposed to work on those yourself'.
It's still just a car, held together with nuts and bolts, and servicing it isn't too bad.

It's just the repair facilities that make things a f'ing crisis when it's just a simple and relatively inexpensive repair and try to charge you 1 grand for plugs and wires.

Use the forum, be informed, do AT LEAST the easy stuff yourself, and pocket the savings!
I mean, changing plug wires isn't rocket science and doesn't require a $150 an hour mechanic.
Nor does changing your air filter(s), cabin filter, wiper blades etc.