E220 2.1 diesel w212 2014
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.




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?
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.


