Here is the data on your 07/97 ML320.
Engine: 112942 30 017998

Engine oil cooler seals bad, leaking.
This has oozed several quarts onto the serpentine belt, throughly coating the front of the engine.

Parts needed:

Seal, Oval engine oil cooler to filter housing.
MB# 112 184 02 61

Seal, round engine oil cooler to filter housing.
MB# 112 184 03 61


Seal, round engine oil filter housing to .
MB# 112 184 00 61

Attached Thumbnails