Quote Originally Posted by rebel.ranter
MRS4 is easy to code. Have you had anyone read the error codes from the car?
I read them myself wit the BMTechnic cable & INPA. HealyC read them himself too, both times the error was the same:

MRS4
81 Fault lamp (AWL)
Error frequency: 1
Error currently present
Short to ground / (Wiring) break
Error not sporadic