Date registered: Jan 2008
Vehicle: 99 c230k
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
To the self-considered Benz Guru
Kay, Ill try and keep this short.
So on my way home from lethbridge to saskatoon, my Check Engine Light went on while i was driving at 120km/h. The car drove smooth, everything was in check, no high temps. So I stopped in the next town, and when the car is idle it's vibrating slightly. It would vibrate in D or P or R. So I turn it off, turn it back on and no vibration. I keep driving and under heavier acceleration the car will get this jerky, vibrate feeling, so I layed off that. It will only vibrate at a stop after Ive been driving for a decent distance already, and under heavy acceleration.
I took it to the benz dealership when I got back in saskatoon. They scanned it and it came up with 2 codes, P0300-080 (misfiring damages TWC),whatever that means, TWC? and it came up with P0304-083 (misfiring of cylinder 4 : 83.
The tech told me to start with the spark plugs, as they shouldnt go further than 4 years. Ive had the car for 1, so i dont know when they were last replaced. But why does the car stop vibrating in idle when i turn it off and restart it.
Also leaving the dealership the CEL was off, and as soon as I accelerated at a decent rate, it came back on, and I vibrated at the next red light.
Any opinions on all of this guys??? Other than spark plugs so I can cover all my bases.
What I don't understand is, how could this be a spark plug problem, if when I turn the car off and on the problem goes away until heavier acceleration? I would think this would have to be some sort of a reset thing like a MAF, as far as i know plugs dont "reset".
This forum gets alot more traffic then mine so i thought i might as well ask here too.