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.
Automatic Hold button (only F25)
The "Automatic Hold" button is integrated within the parking brake button. The "Automatic Hold" button is electrically connected to the DSC control unit.
The "Automatic Hold" function supports the driver by automatically applying and then releasing the brakes, for instance, in stop-and-go traffic. At a standstill, the vehicle is automatically and continuously held hydraulically via the DSC (difference to the drive-off assistant by approximately 2 seconds). On slopes, the vehicle cannot roll back when driving off.
The EMF electromechanical parking brake must be installed for "Automatic Hold". This should not be confused with the drive-off assistant (see SYSTEM FUNCTIONS ).
A switch from hydraulic to mechanical retention is executed under the following conditions:
- The engine is turned off
- A door is opened and the driver takes off his/her seat belt.
- During a journey, the vehicle is braked to a standstill using the parking brake.
Shown F25
| Item | Explanation |
|---|---|
| 1 | Parking brake button |
| 2 | Function indicator light |
| 3 | Automatic Hold button with function indicator light |
| 4 | 12-pin plug connection |
The DSC receives additional input signals from the following components:
NO RELATED
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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.