BMW Multi Tool User Manual page 18

v. Synchronization Codes:
1、 CAS3 code-DME 、CAS3code-EGS: Read and write DME and EGS code
stored in CAS3 system.
2、 Synchronize DME and CAS— this function will be useful while prepare
dealer key or any other operation which cause can't start the engine.
3、 Synchronize CAS and ELV — this function can help clear wheel errors.
4、 Once lost all working key, please don't run this function.
BMW Multi Tool User Manual
18