300SEL (126.025) L6-3.0L (103.981) (1988)
Timing Component Alignment Marks: Locations
Timing Component Alignment Marks
Setting TDC
Set engine to TDC and check camshaft adjustment marks.
For further information refer to Timing Chain : Service and Repair
See: Engine, Cooling and Exhaust/Engine/Timing Components/Timing Chain/Service and Repair
and Camshaft, Engine : Adjustments
See: Engine, Cooling and Exhaust/Engine/Camshaft, Lifters and Push Rods/Camshaft/Adjustments