So, I took my '88 300CE thru NJ bi-annual inspection last week. I FAILED!
14 years and 100,000 miles and it's never failed before.
Soooo... Is this a serious matter? what's the simple fix on this reading....or where to start.


Idle FAIL
HC ppm 257 Standard 220
CO% .38 1.20
CO2% 14.1 ____
O2% 0.6 ____


High Idle - PASS

HC ppm 39 Standard 220
CO% 0.37 1.20
CO2% 14.4
O2% 0.2