I've been using this in my 1995 E300 and I think it is the current oil recommended by MBNA.

Mobil 1 0w40 is available after rebate for $37.46 a case with free delivery in US from Amazon:

Mobil 1 0W40

__________________
-- Chris

'95 E300, 216k miles, Silver Surfer
'05 E320 CDI, 138k miles
'07 S550 4matic, 69k miles

Gone but not forgotten:

'76 300D, 350k miles?, SOLD in 1995
'75 240D, 300k miles, SOLD in 1991