Hi, a l time ago I found this:
http://www.motor-talk.de/forum/konfigurator-fragen-multivan-united-t2210173.html
Google translate
For the Multivan T5 there are different trolleys:
1BA - suspension and damping Standard: This is the standard suspension of the priority operation on paved roads. against a closed vehicle (Trapo) is here the Multivan already 2cm deep.
1BJ - suspension / damping reinforced front and rear: This chassis is designed for use with bad roads (eg gravel). The Multivan gets here stiffer springs and dampers harder.This, however, the Multivan is again compared to the standard suspension 2cm higher and thus at the same level as a closed vehicle (Trapo).
1BB - suspension and damping in off-road version: This suspension should be chosen in areas with hardly any paved roads. The Multivan gets characterized toughest and hardest springs dampers. The Multivan is then higher than a normal Multivan and at the same level as a closed vehicle (Trapo) as 1BJ 2cm.
1BV - Sport chassis: This sports suspension is exclusively reserved for the Multivan. It is for drivers with sporty ambitions. The benefits can be seen by less body roll and greater roll stability of the vehicle. Compared to the production car of the Multivan is a further lowering of 2 cm to. Thus, the Multivan is a total of 4 cm deeper than a closed vehicle (Trapo). This capability is the garage at the level continued to improve. For use come harder and shorter springs and harder damper. The stability average is 25mm front and 28mm rear.
2MD - lowered suspension: Through this suspension leads to a lowering only for aesthetic reasons. Benefits can also be better Garage suitability (analog 1BV). The springs are the Multivan the same as the sports suspension 1BV. Dampers are at the state level but adjusted the damping behavior corresponds to the chassis 1BA. All vehicles (except Multivan) thereby the perm. HA reduced by 50 kg.
more trolleys, which are not available for the Multivan. Please inquire for yourself what T5 versions are these:
... 1BH - Suspension and dampers for vehicles with 3.2 t GVW: This suspension is a standard vehicle for Trapo (closed & open, and Caravelle and Shuttle with choice of 3.2t GVW (ZGG).
2MF - Suspension and dampers (standard) and reinforced stabilizers front and rear: This suspension is not available for the Multivan, serving with the other T5 for less body roll of the chassis and higher roll stability and reduced sensitivity to cross winds. For open bodies from certain structural height of this suspension is technically necessary.
2MG - enhanced damping and stabilizers front and rear with a reinforced stabilization: ---
2MK - Rear suspension strengthened: This suspension should at frequent load on the rear axle up to max. Axle load are used. It is used to compensate the vehicle platform height (eg workshop trolleys)
2ML - damping front and rear reinforced: This suspension comes only when open Trapo used. and corresponds to the chassis 1BJ in closed bodies. Since the open bodies already the strongest springs are fitted as standard, come here also only the damper of 1BJ used
On my current Multivan T5.1 i have 1BB option. Great for bad roads and super nice driving on highways.
Now for my new California T6 i order only option 2MF, because option 1BB is not available
After car will be delivered, my local dealer replace factory suspension for fit SEIKEL Desert suspension:
http://www.seikel.de/shop/hoeherlegung-desert-fuer-4motion/?lang=eh
This will raise body cca. 3cm