300TD (123.193) L5-3.0L DSL Turbo (617.952) (1984)
On models 123 with automatic transmission 722.303 (W 4 A 040) and 126.120. disconnect central plug for vacuum lines (71) or vacuum lines.
Disconnect Bowden wire, compress black plastic clip (arrow) and pull Bowden wire out of holder in rearward direction.
2
Remove rocker arm with rocker arm bearing brackets. See: Rocker Arm Assembly/Service and Repair
3
Set piston of respective cylinder to ignition TDC.
For this purpose, rotate crankshaft with tool combination.