2006 c280 4matic
Discussion Starter · #1 ·
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.