Timing Component Alignment Marks: Locations

The procedure for "Checking Camshaft Timing" can be found under Camshaft, Engine Testing and Inspection

The following is taken from "Adjusting camshaft timing (S65)"
Adjustments

Important!
The procedure for adjusting the timing is different from that for checking the timing.

Cylinders 1-4.






Rotate inlet camshaft with open-end wrench (1) with minimal effort at hexagon head in direction of arrow until special tool 11 9 972 can be attached.
Designation (E1) on dihedron points upwards.
Secure special tool 11 9 972 with bolts (2) on cylinder head to 10 Nm.

Cylinders 5-8.






Secure inlet camshaft with special tool 11 9 971.
Secure exhaust camshaft with special tool 11 9 972.