Failed Smog come on MB...No signs

Last edited by Flame3g; Feb 1, 2013 at 10:52 AM.
It's one of the best ways to blow out carbon and, therefore. increases the chance of passing emissions tests.
http://en.wikipedia.org/wiki/Italian_tuneup
In the old days, owners will complain that their Italian cars aren't driving smoothly. The mechanic would take it for a spin and return the Ferraris purring like kittens

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It sounds to me like the readiness codes were not set and the technician drove your car using the MB Driving Cycle (you can google this). If you had known this, you can do the driving cycles yourself, check via scanner that all the readiness codes are set and then pass smog.
The readiness codes reset every-time you get a MIL light or disconnect the car battery. Did this happen before you went to the dealer?
So the lesson learned for everybody reading this; check your smog readiness codes via OBD-II scanner BEFORE you go to the Smog Check location (if they are not set, don't even bother going to the smog check location). I bought a cheap-o $20 scanner, but some Auto Parts stores loan out these scanners too.



