See also:

BMW Maintenance System
The maintenance system directs you to required maintenance measures and thereby supports you in maintaining road safety and the operational reliability of the vehicle. ...

Tire identification marks
Tire size 255/50 R 19 103 Y 255: nominal width in mm 50: aspect ratio in % R: radial tire code 19: rim diameter in inches 103: load rating, not for ZR tires Y: speed rating, before the R on ZR ...

Maintenance and repairs
Advanced technology, e.g., the use of modern materials and high-performance electronics, requires suitable maintenance and repair methods. Therefore, have this work performed only by a BMW cent ...