Overview
This document contains information on:
General
Function requirements
Function
General
The forced engine start ensures that the engine runs when the on-board electrical system supply is insufficient.Here the engine is force started autonomously by the combustion engine control unit.
Function requirements
Coolant temperature >115 °C
Engine stop period of > 3 mins exceeded
Vehicle speed > 2 km/h in forward travel
Rolling backwards
The ECO start/stop function is switched off
On-board network condition requires the engine to run
Brake assistance or distance control system in control intervention function
Vacuum at brake booster not in specified range
Air conditioning system requires engine to be running
System or communication error in the following systems: steering, on-board electrical system, brake system, accelerator pedal, transmission, engine
Function
A forced engine start is also conducted if the stability of the on-board electrical system can no longer be assured, e.g. as a consequence of load-intensive consumers. The engine continues to run until sufficient stability in the on-board electrical system can be assured.The ECO start/stop function is switched off if the stability of the on-board electrical system is not assured.