Part of the generic B163A overview — this page covers the Mercedes-Benz meaning specifically.
OBD-II Diagnostic Trouble Code
B163A
Left front turn signal output fault - open circuit or short to positive
B
Body
comfort / safety
comfort / safety
1
Mfr
manufacturer code
manufacturer code
6
Body subsystem
3A
Left front turn signal output fault - open circuit…
Severity · general guide
Varies
Body/safety — depends on system
Code type
Mercedes-Benz
System
Body
Model
Sprinter 907