The Westfalia hitch is rated a tad higher at 150 kg vertical load. It has a 15.6 kn permissible D-Value.

"In accordance with legislation, the tow load (Germany: GA) and maximum permissible total weight (Germany: GF) no longer need be specified on the type plate. Only the D-value and the permissible support load are specified. Using the specified D-value increases the possible bandwidth with modification approvals in accordance with paragraph 19 (3) StVZO in Germany. For example, by accordingly varying the tow load it is possible to change the permissible total weight without having to carry out a new approval.

The D-value is determined as follows:

D [kN], GA [kg], GF [kg]


D= (GA*GF*9.81)/ (GA+GF)*1000) "

Reese has a Class III-IV receiver rated at 750# tongue weight for the Liberty when a weight distributing hitch is used.

And you are speed limited to 100kph MAX mostly 80 kph.

_________________
No longer a CRD or Jeep owner. Selling everything I have, needs to go as I need the room for a project.

http://www.verkehrsportal.de/stvo/stvo_18.php has all the nitty-gritty on how maximum legal tow speed depends on the tow equipment, such as anti-sway towbar, tires, ABS, placards, etc.
It's beyond my german ability, though.