You could also be getting oil leaking down through the egr valve.

Is it blocked off?

On heavy throttle i.e. climbing a long grade I get an oil leak at my egr connection that hits the exhaust manifoild.

__________________
'99 S420 - Mommies
'72 280SE 4.5 - looking to breathe life into it
'84 300SD Grey - Sold
'85 300SD Silver - Sold
'78 Ski Nautique