I've tried cleaning MAF sensors on my ML and '98 VW, to no affect (positive or negative). New MAF for the ML was $210 from Impex . Every place else was $60 more, or higher. Genuine Bosch part and it worked fine.

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Lenny

There are only three sports: bullfighting, motor racing and mountaineering; all the rest are merely games. --Ernest Hemingway

'10 GL550/'04 BMW 545/'99 BMW 323/'98 ML320/'87 VW GTI (race)