I have seen many people throw the panels away. I don't know why though. I have not noticed any difference in running volume in either case. Maybe your engine has a problem with the timing chain or with the injection timing? Loud? Is it quiet when first started and gets loud about 30 seconds later? Pay attention to this and get back to me>

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Benzmac:
ASE CERTIFIED MASTER AUTO TECHNICIAN
LEAD TECHNICIAN FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM