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  #1  
Old 11-27-2003, 02:53 PM
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Location: MA, USA
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CEL and Hesitation on C230

Hello,
My ML remains rock solid, but now my 97 C230 is giving strange problems.

The check engine light is on and the car is extremely hesitant and drives like it can't find the right gear or something.

I've read that it could be the transmission itself, or a bad battery.
Would a bad MAF cause the same symptoms?

Thanks
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  #2  
Old 11-27-2003, 05:47 PM
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Location: St. Albert, Alberta, Canada
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It could be many, many, many things. You'll have to have the codes read and a proper diagnosis preformed. You can go to Auto Zone and they'll read the codes, but be warned that this probably won't highlight the exact problem. You'll need to be able to investigate further.

As an example, a misfire code could be a faulty/worn plug, plug wire, etc. The tranny might be giving some fits, mine did and it felt all the world like a bad misfire or fuel starvation problem.

Get thee codes read.
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  #3  
Old 11-28-2003, 09:12 AM
it leaks, its german
 
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What he said.

Likely culprits providing it makes it to top gear.

Coil, resistor tip, plug, wire, MAS, vacuum leak or wiring harness.

If it "sticks" in second or third.

Speed sensors in conductor plate, rear abs wheel speed sensor, wiring harness, shifter posistion switch or atm leakage into the atm connector "wicking" trans oil into the etc.6 control unit.



Joe
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  #4  
Old 11-28-2003, 04:46 PM
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Quote:
Originally posted by joe p
What he said.

Likely culprits providing it makes it to top gear.

Coil, resistor tip, plug, wire, MAS, vacuum leak or wiring harness.

Joe
Joe, the car shifts all the way up to top gear...It's just very sluggish and jerky doing it... the Check engine light had come on, and the code reveals a left feul bank problem which leads to the MAS.

My question is, does a bad MAS make the car all slugglish like this and obviously affect transmission shift points - right ? (crossing fingers)
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  #5  
Old 11-28-2003, 06:07 PM
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Yes, the symptoms do sound like the Air Mass Meter is gone. Has the CE light been on for a while?

Did you get codes P0170 and P0171?
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  #6  
Old 12-14-2003, 09:45 PM
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Join Date: Jan 2003
Location: MA, USA
Posts: 190
Re: UPDATE: CEL and Hesitation on C230

Ok,
Got the Mass Air Flow Sensor from Fastlane (mercedesshop - THANKS PHIL!!- The dealer wanted $500 and I got it from him for $300) and in 5 minutes swapped out the old one.

The car is PERFECT.

The whole problem was due to the MAF sensor.

The fault code indicated 02 sensor, but as it turns out a bad enough MAF sensor will set an error code indicating 02 sensor problem as well.

Thanks everyone.
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