vegastud

I have a 2000 c230 Kompressor (W202). It has 175,000 miles.

I was passing a car yesterday and gave it some gas to get by and the check Engine light came on. It drove very rough and badly after the Check Engine light came on. I got it home and checked the codes. There was one code, P0301.

I did a compression check:
Cylinder 1 psi: 160 & 155
Cylinder 2 psi: 130 & 135
Cylinder 3 psi: 160 & 160
Cylinder 4 psi: 120 & 120

I then installed new spark plugs and spark plug wires (I had bought some a month back, hadn’t installed them yet).

I then changed the places of the two coils. I put #1 & #2 coil where coil #3 & #4 was, and vice versa.

Now I have five new Check Engine codes: P0300, P0301, P0303, P0300 P, & P0301 P.

Anyone have any advice or answers. Thanks in advance.

Vegas

khomer2

Have you checked your MAF?
What about your cats? any rattling noises when you start the car?

vegastud

So an update.

When I swapped the coil packs it triggered more Check Engine codes. My guess was the coils were bad. I bought two new coil packs from Autohausaz, installed them and my C230 is running well again. Problem solved.

Thanks for everyone that responded

ontariobill

I had the same problem with my C280, I didn't swap coils but found the misfire on #4 and replaced the coil, worked like a charm no further issues