First read and observe the introductory information
and safety warnings
Headlight adjustment
Towing a trailer can raise the front end of the vehicle enough for the dipped beam to blind other road users. Use the headlight range control to lower the light cone as required. If you do not have headlight range control, the headlights should be adjusted by a qualified workshop. Vehicles with gas discharge bulbs adjust automatically and do not require manual adjustment.
Things to note when driving with a trailer
Pulling off on slopes when towing a trailer
Depending on the steepness of the slope and the total weight of the trailer and vehicle, a parked vehicle towing a trailer can roll back a short distance when pulling away on a hill.
When towing a trailer, pull off on slopes as follows:
once to switch off the electronic
parking brake .
button and hold it in this position
to hold the vehicle and trailer with the electronic parking brake.
button when the engine
has sufficient power to move off. 
WARNING
Loading the trailer
Trailer stabilisationRemoving and installing curtain airbag with igniter, estate
Special tools and workshop equipment
required
Release tool -VAS 1978/17- from release tool case -VAS
1978/35-
Removing
...
Checking compression
Special tools and workshop equipment
required
Spark plug socket and extension -3122 B-
Compression tester -V.A.G 1763-
...
Assembly overview - dual halogen headlight
1 -
Bulb for side lights/daytime running lights/main beam headlights
The bulb has 3 functions:
Left side light bulb -M1-/right side light bulb -M3-
Left daytime running light bulb -L174-/right daytime running light
bul ...