You may have a simple problem. I would have a knowledgeable tech look at this though, not a hungry one. The tech needs to assess the problem...The oil consumption can be a result of diluted oil from a rich condition. This would explain the high HC and CO... Have this checked.

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Benzmac:
Donnie Drummonds
1991 GMC Syclone
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM