Function of the hydraulic engine mounts - ra22006010210x(0210)

WARNING: This page does not describe the selected car, but rather 42 other vehicles, including the 1999 Mercedes-Benz S600, 1999 Mercedes-Benz S500, 1999 Mercedes-Benz S420, 1999 Mercedes-Benz S320, and 1999 Mercedes-Benz CL600. However, it is still accessible from the selected car via links, so may be relevant.

Engines 601, 602 (except 602.98), 603

Fig 1: Identifying Hydraulic Engine Mounts

The hydraulic engine mounts are filled with a glycol mixture. The glycol mixture is located in two chambers (b and c). The two chambers are connected to each other by an annular passage in the plastic disc (6). The glycol mixture flows along the annular passage into the respective chamber as the springs compress or rebound. A diaphragm (5) limits the upper chamber (b). Air is admitted to or released from the diaphragm space (a) through two passages. The rubber stop plate (7) in the lower chamber (c) is firmly connected to the bearing foot and limits the spring travel during compression. The engine mount (4) is attached by a hexagon bolt to the engine supporting bracket and by a hexagon socket bolt to the frame cross member.

All parts of the engine mounting are maintenance-free.

The hydraulic engine mounts have identical load bearing capacity on the left and right but differ depending on the various engine and transmission versions.

They are identified by a colored dot on the housing in order to avoid any mixups.