Just helped a friend with his 91 190E 2.3 yesterday.

EHA was leaking, we installed new o rings, and it still leaked. Grabbed another from a parts car, and that cured it.

Looked like the case was cracked on the original one.

Be careful not to drop the fasteners...

Jim

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14 E250 BlueTEC black. 45k miles
95 E320 Cabriolet Emerald green 66k miles
94 E320 Cabriolet Emerald green 152k miles
85 300TD 4 spd man, euro bumpers and lights, 15" Pentas dark blue 274k miles