I recently bought a 95 e320 wagon. I removed the cover from underneath the engine about a week ago and now there is oil on the driveway. Seems to be leaking at the front of the oil pan. My guess is that it's leaking down from the front of the engine somewhere. Any idea what this could be? Front crankshaft seal? Is this an expensive repair?

 

it can be crankshaft oil seal, cyl head gasket, cyl head cover gasket, front cover gasket or timing chain tensioner.