Ram Trucks 2015 Cargo Van Commercial - Owner Manual - Manual (Page 274)

A hydraulic pump contained within the shock absorbers
raises the rear of the vehicle to the correct height. It takes
approximately 1 mile (1.6 km) of driving for the leveling
to complete depending on road surface conditions.
If the leveled vehicle is not moved for approximately
15 hours, the leveling system will bleed itself down. The
vehicle must be driven to reset the system.
ROOF LUGGAGE RACK — IF EQUIPPED
The crossbars on your vehicle are delivered stowed
within the roof rack side rails. If adding cargo, deploy the
crossbars. Distribute cargo weight evenly on the roof rack
crossbars, to maximum of 150 lbs (68 kg). The roof rack
does not increase the total load carrying capacity of the
vehicle. Be sure the total load of cargo inside the vehicle
plus that on the external rack does not exceed the
maximum vehicle load capacity.
The crossbars and side rails are designed to carry weight
on vehicles equipped with a luggage rack. The load must
not exceed 150 lbs (68 kg), and should be uniformly
distributed over the luggage rack crossbars.
Crossbar Stowed In Side Rail
272 UNDERSTANDING THE FEATURES OF YOUR VEHICLE