Run-Flat System PAX, Examining Support RingA/C Service Station, Emptying
Caution
If it is suspected that chemicals were added to the
refrigerant circuit to seal leaks, do not connect the
A/C service station and do not extract the refrigerant.
...
Run-Flat Tire (PAX), Lettering On Side Wall
In contrast to conventional tires, other designations are
found on the tire flanks of PAX tires. In this way, these tires
can be allocated clearly.
PAX Tires, Designations
245  ...
13-Pin« Trailer Socket
The backup lamps, »continuous current«
and charging cable can be used on the trailer with the
»13-pin« trailer socket. A
»13-pin« trailer socket is
recommended if a bicycle rack will be installed or a camper will
be towed.
  ...