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Old 07-01-1999, 05:46 PM
Posts: n/a

My owner's manual shows a Bosch F 9 DCO as the plug for my 1997 C280. My local parts guy says Bosch now calls for an F 8 DC4, a slightly colder plug, I believe. Is the F 8 DC4 OK for my car or should I insist on the F 9 DCO?