itsurdaddyl

So I have had my s550 for 7 months and I have been having a idle problem with this car since,I have took it to the dealer around 5 time and they can't seem to fix the problem because it doesn't show on on there computer as the car has any problem,so now to explain the problem,my car seems to idle high on random times and sometimes when it does such thing car feel like it gonna turn off but it doesn't shut off(so far it did shut down on me 2 times since the 7 months I have had it but the car will turn back on with np)also I think this idle problem is messing with my tranny because sometimes I feel a crazy kick like if someone hit me from the back but that happens when I am going slow and it seems like the idle kicks in and makes the car do the little kick.if someone have had this problem please let me know because this problem has been getting to me.

itsurdaddyl

Tommy????lol

itsurdaddyl

I meant to say that the idle revs low(so basically the rpm needle drops lower)

cool_lagoon

any update on your issue? was it resolved and how ?

itsurdaddyl

Nope I have had this ongoing problem for the past 6 months and the dealer can't seem to know what's the problem,also after reading up it seems like its a rough idle that I am feeling now it still has a rough idle and the rpm drops a little low when on park.

IDriveAnM5

I had a "rough" idle problem where, from time to time, it would sort of grumble and shake the whole car. Not catastrophic, but noticeable and definitely wrong. My dealer diagnosed a bad ignition coil and replaced it under warranty. Mine was definitely easy to pick up as engine-related from the driver's seat.
Sorry if that doesn't help.
Don't know your mileage or 4Matic config (i.e. RWD or AWD), but if you think it is transmission related, don't rule out the differential / transfer case also.

itsurdaddyl

Thanks for th reply M5 and the mileage is 49k and it's not 4matic.your problem sounds exactly like mine,when they replaced your coil did it fix the shake?

Shifter

What steps have they taken? Compression test? Sounds silly, but is the airbox mounted onto the MAF correctly?

cool_lagoon

hahahaha, at least you are providing a lighter moment, as your screen name says it all as well as your question. (Knowing nothing).

Shifter

oh please explain yourself. Why are my questions not relevent?

IDriveAnM5

The ignition coil was the problem. Smoothed it right out...

Shifter

Great it was only a coil.

On a side note...Still waiting for moron lagoons response to my questions. You must not know the 272/273 family very well. And, why do you think I would pick such a name?? Again, moron.

cool_lagoon

only a dumb idiot would think of the compression issue on the problem being discuss. and a stupid question from an idiot deserves no reply or explaining.

Shifter

You are simply retarded, and know nothing of cars.
Do you really think low compression would not cause a rough idle/missfire issue? Seen this personally on this 273. Also, a improperly installed airbox causes mixture selfadaptation issues, which also causes a poor idle.

Apparently you have no advise do offer, only criticism to those trying to help. Good job!
I'm done now, unsubscribed.

IDriveAnM5

Hang on, that was my car's problem. Not the original poster. I think his issue is as yet unresolved.

Glyn M Ruck

Guys - clean up this sandbox or we will clean it up for you! Enough!

Arlen777

I have the same issue although my car hasnt shut down on me and idle problem isnt that noticable. Although that "kick" that you are talking about, i had it couple of times randomly when i was sitting in traffic. To me it felt like someone rear-ended me. Plus during that kicks door locks unlocked and then relocked.

cool_lagoon

if your so good, how come you are on this forum inquiring things as well? bragard and a liar, you don;t even have a W221 your just a humbug, stop suggesting or sharing ignoramus dumb founded out of this world repair approach, you are causing more harm and confusion than helping resolve a fellow MB owner in resolving the issue.

Glyn M Ruck

Next comment playing the man & not the ball & this thread will be locked & infractions issued to ALL involved. Affluence has nothing to do with common sense or breeding & manners.

Some likely causes are, an ignition coil, bad airbox to MAF seal leaving the MAF hunting to correct fuel trim, a vacuum leak or a throttle body actuator acting up. Some actuators chatter & require replacement. TB actuator trouble never shows up on a Star.

Causes of locking/unlocking problem not plain.

US dealers are a bunch of parts changers. They could not diagnose a headache & are lost without a Star. Try & find a dealer that actually has a Service Manager that is technically competent on Benz cars & a true tech go-to person. Preferably someone appointed by Benz with a good Benz history as one finds in ROW.

itsurdaddyl

Hi guy sorry for the super late response,but anyway as far as this problem I am still having it,Arlen777 yes I get that exact same kick when i am. In traffic feels like someone just hit me from the back but my doors never locked and unlocked,as far as what the dealer did they did everything from cleaning the injectors to the engine,they really only rely o n these computers to tell them the problem Witt the car but the computer can't read any problem with the car but yet there able to feel the turbulence that my car gets,they try to tell me that it's normal lol.at this point it's back in the dealer for the 6 time for same problem.car hasn't shut of on me recently but it does still shake on idle.

cool_lagoon

itsurdaddy where are you from? (location) if you did brought your car to an authorize dealer of mercedes benz they should be able to fix it, if you do not feel your dealer is dependable there are hundreds of dealership on each State and all over the US, not only through the star computer but through technical service bulletin on your issue, unless you took your car to a non MB dealership that's a total different story.

When you say turbulence what did you mean? three part to check, fuel system, electronic/electrical system, mechanical side. Sorry Can't get you an intelligent suggestion with all your artistic term not easily understood by an auto tech, wish you can lay it down without the art and just the facts.

itsurdaddyl

When I said turbulence I meant a shake that last for not even a second but moves the whole car.yes the car only get serviced in the mb dealer of miami

cool_lagoon

When I said turbulence I meant a shake that last for not even a second but moves the whole car." I see no problem with shakes that does not even last for a second, as per your statement. In fact if your saying it does not shake even for a second then you have a perfect car.

itsurdaddyl

I forgot to add 2 before second ad no its not perfect as its not a normal thing for any car

Shifter

Still no fix.. come on.... what was it lets see.