I had the crankshaft seal replaced (actually for the second time in 3 months, in addition to a new harmonic balancer, bolt, and pins) as well as the seal between the oil filter and the block, and my diesel with 206K miles doesn't leave a spot on our white concrete driveway. Before the crankshaft seal was replaced, it looked like the Exxon Valdez spill. Take the car to a MB mechanic...and make him give you a guarantee when you have the crankshaft seal replaced. Over $700 later, I wished I hadn't been a cheapskate and had the repair done locally. You may not be able to eliminate ALL of the leaks, but people you visit won't call and complain about your car leaking.