300SL (129.061) L6-3.0L (104.981) (1991)
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1. Position of cylinder 1 to ignition TDC.
2. Remove front cover at top.
Engine 104.98x, Engine 104.99x Similar
3. Mark timing chain relative to exhaust and inlet camshaft sprockets (arrows).
4. Unscrew bolt (3); counter hold Immature (4) at flat (arrow) for this step. Pull off armature (4).
5. Unscrew nut (6). take off cover with ring (12).
6. Engine 104.98: Remove guide sprocket (1) with bearing journal (2). Caution: Left Hand Thread!
Mark guide sprocket on front before removing so that the direction of rotation is maintained when re-installing.
