if U have your owners manual it will state what spec you need I have found that the Valvoline synthetic-dino oil blend worked well when I put it into the noisey differential of the 190e it quieted down quite a bit it was something like a 80w -140 but that might not be what is needed for your trans so check your manual if you can

Haasman

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'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)