Figure 130. The oil radiator (1) is located at the rear of the engine
Figure 131. Oil radiator mounting parts: 1 - Hex bolt; 2 — mounting bracket; 3 - bolt; 4 - oil radiator; 5 - gasket; 6 - sealing ring; 7 - threaded plug; 8 - sealing ring; 9 — body; 10 — bolt; 11 — guide bushing; 12 — spacer sleeve; 13 — mounting bracket; 14 - Hex bolt
The oil cooler is mounted at the rear of the engine (figure 130). Since it is not visible, its dismantling is associated with certain difficulties. The easiest way is to first remove the gearbox to gain access to the radiator from the top of the engine. The fastening and connection details of the oil cooler for the 2.9L engine are shown in the figure 131.
[Article was borrowed from the website mercedesman]