Turn Engine To Top Dead Center Position - AR01.10-P-1000-01MFG

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Engine 139 in model 118, 177, 247

Fig 1: Identifying Counterholder (654 589 00 40 00)

Courtesy of MERCEDES-BENZ USA

Courtesy of MERCEDES-BENZ USA

Position counterholder on the belt pulley (1).
Turn Engine with counterholder in the direction of Engine rotation until the belt pulley marking (2) matches the marking on the Engine (3).
Do not turn Engine against the direction of Engine rotation.

Otherwise, the timing chain will jump, which will cause Engine damage.

Check the precise alignment of the marking belt pulley (2) and marking Engine (3) using a mirror.

The piston of cylinder 1 now stands at top dead center (ignition TDC).