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Trouble with P0172 code

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Car
Make: Mercedes
Model: C200 (W203)
Year: 2002
Engine: 2.0ltr Petrol - Kompressor

I've got trouble with my car. The MAF sensor failed with error P0101, I ordered and fit a replacement MAF and the engine started running extremely choppily and losing power when trying to pull away. The CEL came back on with error P0172. However, putting the old sensor back on brings back P0101 but the engine runs smoothly.

Is this a problem with the new new new (I've had 2 replacements) MAF sensor, or is it revealing a deeper seated issue with the car?

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