B5F1EE Mercedes Fault Code :
Read the description of B5F1EE in CPC301T and the engine lights up for CPC301T Common Powertrain Controller code, there are some possible causes for it.
The electrical line from pin 10A17. IV-40/26 to the component 'Reverse gear input (GOT_SENS)' has an open circuit or a short circuit to battery voltage.