Bar
Metric unit for tire pressure. There are 14.5038 pounds per square inch (psi) to 1 bar; there are 100 kilopascals (kPa) to 1 bar.
See also:
Vehicle data, GL 550
The data stated here refers specifically to a
vehicle with standard equipment. Consult an
authorized Mercedes-Benz Center for the
data for all vehicle variants and trim levels.
...
Safety & Reliability
As of this writing, the Insurance Institute for Highway Safety has not yet
crash-tested the GL-Class. Eight standard airbags include three-row side curtain
airbags and seat-mounted side-impact air ...
Tires
The specified tire pressure is
printed in yellow on the emergency/collapsible spare wheel. ...