Today I decided to smog my car. I was going to wait until I replaced the O2 sensor but after reading even more posts about them I decided to just go and see what the outcome was.

Well, my car passed, which means that my O2 sensor works so I won't have to worry about that. The only catch was that my gas cap failed so I bought one on the spot and used it to pass. The tech opened a drawer filled with MB gas caps, said that they all fail, that sucks. Here's the results, they seem good, at least I think so

HC CO NO
Test - Max - Ave - Meas - Max - Ave - Meas - Max - Ave - Meas
15 - 105 - 31 - 49 - .69 - .10 - .06 - 757 - 237 - 90
25 - 80 - 20 - 23 - .56 - .09 - .04 - 696 - 199 - 25

Test - %CO2 - %O2
15 - 14.9 - 0.0
25 - 15.0 - 0.0

__________________
1992 Mercedes-Benz 400E
2002 Mercedes-Benz ML500