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Anyone help figure this out?

975 Views 10 Replies 4 Participants Last post by  C_klasse2124
I purchased my '06 c280 4matic almost 2 months ago and I have had no noises or problems until now. When I turn her on, the engine sounds louder than it ever was before, and it only stays like that for a couple minutes then goes back to normal. It been like this for a few days now. I have no clue as to why it's louder because I have done nothing different except for put 92 octane in when I have consistently filled with 93; but it doesn't make sense that the octane would make a difference. Anyone have a clue as to what going on? Thanks.
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If the service was done at the dealer, any dealer can pull up the service records. You might also be able to get them from 800-FOR-MERC. It is possible they are trying to hide problems from you, it is worth checking. This is one of the advantages to buying from a private party: my car came with full service history, including the less flattering things that had been done (hood repainted due to serious scratches from a garden hose).
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