I checked the connections for the tubing on the Mass Air Sensor yesterday. I reconnected from the Air filter housing tub to the MAS and verified the other side of the MAS was not loose and reset the codes. I drove the car almost 8 miles before the CEL (Check Engine Light) reappeared.

The replacement MAS arrived today. I replaced the MAS and let the car idel for a few minutes then drove it really hard for about 5 miles. I have my fingers crossed - no CEL yet. If CEL reappears, I'll post a response - if not, the MAS fixed the problem.

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Russell McMahon
Tulsa, OK
2001 CLK 320
1992 400se
1993 400e
2000 320ML