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 (N12)"
Adjustments
Rotate exhaust camshaft with special tool 32 2 100 in direction of arrow.
Pretension camshaft with special tool 32 2 100.
Attach special tool 11 9 540 (exhaust side) to dihedron and secure with bolt (1).
Attach special tool 11 9 540 11 9 540 Gauge (inlet side) to dihedron and secure with bolts (1 and 2).