The tachograph is faulty
â–¶ How to fix
Both the conventional and the adaptive cruise control are non-functional and an error message is displayed when the fault code is active.
What you'll see
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
Detection
The tachograph sends an error message on the CAN-bus.
Possible cause
Fault in tachograph.