Just for future reference, whats the symptoms for a MAF sensor failure on a 99-2000 C230K? How/what will the car act if it goes? Aswell will cleaning it prevent it from going or fix it?

My car has 78 000kms.

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99 C43
98 S420
99 C230K
01 C240

Do a search in this forum for the array of symptoms.
So far had not read of cleaning fixing the MAF.

Symptoms;
Check Engine Light
Funky transmission shifting

Use OE air filters and keep them clean.

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1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200

. . but from what I've seen at my tech's shop, there's NO symptoms, just the CEL. Car runs fine w/ CEL on.

Funny story; one customer had it pass smog but the CEL was discoved to be on, so they had to fail him. . . but the car was fine. The MAF was replaced ($380+) and the CEL went off. And it passed smog!!

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Regards . . . . JimF
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'94 S500 Cpe

Visit my Mercedes Web Page

It depends on how bad the sensor is. If the sensor is producing values slightly outside the design range, the only detectable indication is the CEL on. However, if the sensor is further out of spec, you may notice stumbling, poor fuel economy, rough running and any number of other symptoms. On my 2001 VW GTI VR6 I noticed the running problems well before the CEL came on.

no lights on the dash

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99 C43
98 S420
99 C230K
01 C240

Everyone seems to agree on this. And especially don't use those K&N filters which are said to be MAF killers.

Mike

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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra