BenzWorld Junior Member
Date registered: May 2008
Vehicle: CLK320 1999 Black/Black/Black
Location: South Florida
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A code checker is definitely worth it if you're a "do it yourself er." However, my check engine light was turning on intermittently. I was told by my mechanic that it has to do with the Ethanol being added to fuel that is not mixing well and is causing the sensors to get false readings.
He said stick to Chevron as they have not added the ethanol mix yet. I cannot say how much of this is reality, but when I started pumping Chevron the check engine light went off, and has stayed off.