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E220 2.1 diesel w212 2014

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Old Aug 13, 2025 | 07:01 AM
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Louisc999's Avatar
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E220 AMG Line Sport
E220 2.1 diesel w212 2014

Hello, I’ve taken my car to the garage and it comes up on a snap on OBD 2, saying low boost.

I have a whistling noise, this is only there when the engine is on, and/or when my ac unit is on.

It stops when my engine is off, when the AC unit is completely turned off.

any ideas?

Last edited by Louisc999; Aug 13, 2025 at 07:27 AM.
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Old Aug 13, 2025 | 06:12 PM
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W212 MY'14 M276-3.5NA @75kMi
MULTIPLE ENGINE ISSUES

Originally Posted by Louisc999
Hello, I’ve taken my car to the garage and it comes up on a snap on OBD 2, saying low boost.

I have a whistling noise, this is only there when the engine is on, and/or when my ac unit is on.

It stops when my engine is off, when the AC unit is completely turned off.

any ideas?
There's no connection between "Low boost" fault and noisy A/C running... two distinct issues!

Your car needs timely maintenance. Get this worked on by local MB specialist soon. This shouldn't cost much because you're early.

Keep up with 5000Miles oil service.
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