You need to a BT CAN service key to unlock the hidden calibration & service functions on this truck.
NOTE: A BT CAN service key & RRE can be a dangerous combination!
If you can find someone with a BT CAN service key you can then get in to the diagnostic mode which can show all the input & output signals on the truck which in turn will show which sensor or height counter channel isnt working correctly.
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.