AJTanner

i think its your ignition coils.. i have the same problem right now.. if you have high mileage like 130k + you may need to replace them.. i had to.. my check engine light came on and my car started shaking while idling etc.. i replaced them .. mind you u need to replace 6 of them because you have 1 ignition coil for each of your cylinders.. well you may not need to replace all. maybe one or 2 isnt working probaby..

berettagtz

if it's the coils, then 4 of them are probably not working, because I have missfire on 4 cylinders..

I took the car to an independent here in town, and he doesn't have time to look at it until Saturday...
I will go crazy until then...

KA8

can't believe problems isn't solved for so long

AJTanner

trust me i got the same problem.. its the ignition coils.. get them replaced or call mb and ask them if that could be the problem .. 90% it is..

berettagtz

I can't believe it either...
It's driving me nuts.

berettagtz

what's the best way to test the coils??
Since only two cylinders are not missfiring, I was thinking about unplugging the two coils that are on the working cylinders and plugging them back to the cylinders that are not working... and then do a OBDII test and see if it is missfiring on the same cylinders... if it is not missifiring on the same cylinders, then it is probably the coils...

AJTanner

yeah give that a shot.. if its true.. then get em replaced whenever.. its not going to kill your car.. what happens is when they misfire.. the richness of gas/oxygen given to your car may vary.. sometimes too rich.. or not rich enough.. ive heard that it can mess up your oxygen sensor but its just bs i think.. ive had that problem for 2 monthes now.. going to get it fixed soojn.. but im in no rush..

berettagtz

check this...
so, on my way home from a soccer practice I stop by the advance auto parts store to check the codes once again...
here is what the OBD said:
P0301
cylinder 1 misfire detected

P0301
cylinder 1 misfire detected

P0112
IAT Sensor 1
Circuit Low Input

P0102
MAF or VAF
circuit low input...

What is going on now?? Only cylinder 1 is misfiring, and now it is showing the MAF?

Fastgreek

this happened to my e320 ever since i started putting gas from wawa up in pennsylvania.I had my car in several times because of this.What i am trying to tell you is STOP USING OFF BRAND GAS.............I had rust spots on one of my injectors from this **** gas.I used 89 oct gas always but as soon as i used this **** gas i started having probems.I dont use it anymore .Hope this helps.

Fastgreek

and my mass air meter was repaced because of this.Stay away from off brand gas.

berettagtz

My hands are still oily and black as I'm typing this...
So, I took the coil pack from cylinder two, and put it in place of the coil pack on cylinder one... Turned the car on, and whollaa... No more vibrating, no more power loss... I am so happy... But however, the check engine light is still on...
I am gonna buy a new coil pack as soon as I get a chance... but I am so glad that I figured it out without the stealership's help...--so proud!!

THANKS TO ALL OF YOU GUYS WHO HELPED ME!!!

AJTanner

no problem haha the only way to get that light off is to bring it back to the dealership...i think..when my mechanic does it the light goes off and comes back on.. the dealership willl be able to keep it off lol

berettagtz

I went to auto zone, and they turned it off... It might come back on but at least I know what is wrong now..

AJTanner

itll be off for a couple days, most likely will come back on.. mine does.. but i stil havnt replaced my egnition coils yet.. going to cost me around 350 for two of them...

berettagtz

you were right.. It came back on today... I will probably only get one coil for now, and see how it does... and eventually I will replace all of them..

AJTanner

yeah same with me, no rush, and... well.. my lights been on for 2 monthes now. i just ignore it lmao but if you want your light to stay off.. ask mercedes.... they can do it.. itll cost $. but i dunno if itll stay off untill you replace a coil or two lol