Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Combustion Engine Forced Start, Basic Function - GF07.10-P-1059A
Engine All (4xWD)
Engine All (CAR)
Overview
This document contains information on:
- General
- Function requirements
- Function
General
The forced engine start ensures that the engine can still run in the event of insufficient supply to the on-board electrical system. In this case, the engine is autonomously force started by the combustion engine control unit.
Function requirements
- Coolant temperature > 115°C
- Exceeding of engine stop period > 3 min
- Vehicle speed > 2 km/h in forward travel
- Rolling backwards
- The ECO start/stop function is deactivated.
- 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 will continue to run until sufficient stability of the on-board electrical system can be ensured.
The ECO start/stop function is switched off if the stability of the on-board electrical system is not assured.
| Additional basic functions | |||
| Combustion engine control unit, basic function | GF07.08-P-9890A |
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.