See Figure 1 and 2
A spring plate clutch that automatically compensates for wear is used, so no periodic adjustments are required. Apart from the usual slippage which accompanies severe wear of the clutch plate or disc, Mercedes-Benz has a simple tool, which can be purchased from a dealer that measures the amount of wear on the clutch plate. Actually, it is a simple "go-no go" gauge.
- A plastic shim is installed between the slave cylinder and the bellhousing.
- The shim is provided with two flat grooves running diagonally from bottom to center. When the shim is installed, these grooves appear as slots. Use groove (a) for left-hand drive vehicles and groove (b) for right-hand drive vehicles.
- The clutch slave cylinder pushrod has two different diameters. The jaw width of the test device corresponds to the smaller diameter of the pushrod. If the notches on the test device disappear when the test device is inserted as far as it will go, the clutch plate is still operational.
- If, however, the notches on the test device remain visible, this is an indication that the clutch plate is worn severely and should be replaced.
REMOVAL & INSTALLATION
See Figures 3 through 20
- To remove the clutch, first remove the transmission and bellhousing.
- Loosen the clutch pressure plate hold-down bolts evenly, 1-1 1 /2 turns at a time, until tension is relieved. Never remove one bolt at a time, as damage to the pressure plate is possible.
- Examine the flywheel surface for blue heat marks, scoring, or cracks. If the flywheel is to be machined, always machine both sides.
- Coat the splines with high temperature grease and place the clutch disc against the flywheel, centering it with a clutch pilot shaft. A wooden shaft, available at automotive jobbers, is satisfactory, but an old transmission mainshaft works best.
- Tighten the pressure plate hold-down bolts evenly 1-1 1 /2 turns at a time until tight, then remove the pilot shaft.
Most clutch plates have the flywheel side marked as such (Kupplungsseite). Do not assume that the pressure springs always face the transmission.