With a low remaining range:
The Check Control message appears continuously below a range of approx. 30 miles/50 km.
Refuel promptly
Refuel no later than at a range of 30 miles/50 km or engine operation might fail and damage might occur.
BMW X3 Service & Repair Manual > Transfer box: Replacing transfer box control unit (longitudinal torque module) (atc 450)
Special tools required:
11 1 200
11 1 380
23 0 490
IMPORTANT:
Before and after replacement, execute the "Repair" service function with the BMW diagnosis
system.
READ AND COMPLY WITH NOTES ON PROTECTION AGAINST
ELECTROSTATIC DISCHARGE (ESD PROTECTION) .
Necessary preliminar ...