Description
The engine makes a knocking or a sort of rattling sound when I rev it. This does not happen when it's ideling. There is also a noticeble amount of power loss. If you know what might be wrong could you please let me know in the comments below.
Keywords
Mercedes, Benz, Ml, 270, Cdi, Ml270, Ml270cdi, Broken, Knocking, Rattling, Badsound
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