It's not a clogged up toilet is it? If you do regular changes with quality oil then there's no need to flush it. I'm changing the oil pan (PO had issues
) on our "new" 93 300D. Insides look as new, just the oil was black. Certainly no flush needed at 200K miles.
'83 280SL, 5 spd.
'87 300E (5 spd. conversion)
'94 E320 (green! maybe future 5 spd)
'95 E320 Wagon
'95 E320 Sdn.(on loan to mom!)
'95 E320 Sdn. (parting out, 98K miles)
'01 SLK320, 6 spd