Volkswagen Golf Service & Repair Manual: Inlet and exhaust valves

Removing and installing valve stem seals (cylinder head removed)

Special tools and workshop equipment required     Removal and installation device for valve cotters -VAS ...

Checking valve guides

Special tools and workshop equipment required     Universal dial gauge bracket -VW 387- &nb ...

Other materials:

Changing headlights over from driving on left to driving on right (gas discharge headlights for cornering light and LED daytime running light)
If a right-hand drive vehicle is driven in a left-hand drive country, or vice versa, the headlights must be converted. This is necessary in order to avoid dazzling oncoming traffic with the asymmetric low beam headlights.   Note ...

Refrigerant machine oil
Refrigerant machine oil is miscible (approx. 20%–40% depending on the type of air conditioner compressor and the quantity of refrigerant) in the refrigerant. It circulates continuously in the circuit and lubricates the moving parts. ...

Removing and installing trailing arm with mounting bracket, except for e-Golf
Special tools and workshop equipment required     Torque wrench -V.A.G 1332-   Engine and gearbox jack -V.A.G 1383 A- ...