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 stabilisationLow-pressure switch for air conditioning system -F73
Function:
In the event of pressure loss in the refrigerant circuit,
switches the air conditioner compressor off (at approx. 2 bar).
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Instructions for work on underbody and stone chip protection
Note
The structure of the underbody and stone chip protection is
to be reconstructed to conform to the original condition in
appearance and thickness.
Water drainage holes must remain clear.
...
Preface
The contents of this guide are separated into two parts.
The first part contains information and important notes on
the subject of “Trailer operation”. The technical prerequisites
for towing trailers or the function of the trailer control ...