The Check Control system monitors functions in the vehicle and notifies you of malfunctions in the monitored systems.
A Check Control message is displayed as a combination of indicator or warning lights and text messages in the instrument cluster and in the Head-up Display.
In addition, an acoustic signal may sound and a text message may appear on the Control Display.
BMW X3 Service & Repair Manual > Suspension: Final drive oil for bmw m1 motorsport coupe
3.0 FINAL DRIVE OIL FOR BMW M1 MOTORSPORT COUPE
The final drive of a BMW M1 is integrated into the manual transmission and the oil supply is accomplished
with a mutual oil filling.
Use reputable brand SAE 80 manual transmission oil conforming with specifications MIL-L-2105 A or API-
GL 4.
4 ...