First read and observe the introductory information
and safety warnings

WARNING
Fitting the removable ball coupling
Hitching and connecting the trailerExtraction System Group Classifications
At this time, A/C service units for extracting, cleaning and
filling refrigerant for motor vehicle A/C systems are available
from various manufacturers.
Group 3:
Mobile extraction and charging systems for filling
c ...
A/C Compressor Regulator Valve -N280
Note
For switching pressures, removing and installing switches
and switch arrangement and version, see vehicle-specific
refrigerant circuit.
Refer to
→ Rep. Gr.87.
...
Beru Wheel Electronics Tire Pressure Monitoring Sensor, Removing and
Installing
Overview, Beru System
WARNING
If tire sealant was used, then the wheel electronics
on that particular wheel must be replaced.
WA ...