You know, it was a long time ago, and I forgot what he said... in any event, I remember it making sense.

I dropped my car off @ the dealership today because I must've been running on 3 cylinders. I didn't think about it today, but when I pick it up tomorrow, I'll ask again... and tell the problem.

Also, check engine bulb was replaced about a year ago, so that's not an issue.

BTW, this information pertains to my 1995 C280 with 137k miles on it.

1995 C280 (& S320, SL320, E320) were all fully OBDII compliant. Yes, one year early. It's fully certified.
Here is a picture of the emissions info under the hood... it's the hardest thing to read, but there is an arrow towards the words "OBDII Certified"

Have a good day.

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2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)