Bosch Drive Unit Kit Cargo Line With Mounting Plate (BDU3741) The smart system Compatible. Whether youre tackling a steep hill or pedaling on the flat 85 Nm of torque and a perfectly tuned transmission provide powerful yet natural support. Cargo mode is specially designed to support the unique requirements of eCargo bikes. You get maximum performance and 400% support – four times your own pedal power. When you need to get off and push Cargo Line walk assist eases the burden. Press and hold the minus button to activate. As soon as you start to push motor support kicks in. At the same time the integrated hill hold function stops your bike from rolling backwards or downhill.