1997 c280 head gasket
Last week my dealer replace head gasket on my 1997 c280 as goodwill (55,000 miles ), everything was wipe clean of old oil including the undercarrige. today I saw some oil on the undercarrige. I told the dealer about this they said to bring it back but, before I take it back I like to know if anybody have any helpful hint for me to tell the dealer where to find the leaks coming from. because I hate to see them redo the entire work again.