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.
Active seat back width adjustment
If the active seat back width adjustment is activated, the outside backrest side section is activated during cornering. The drive adjusts the backrest side section during cornering until the lateral forces are supported. A stable seat position is thus maintained.
For actuation, the following signals are evaluated:
- Vehicle road speed
- Lateral acceleration
- Longitudinal acceleration
- Yaw rate (rotation around the vertical axis)
- Steering angle
- Steering-angle rate
- The engine must be running
On stretches of road with many bends, the two armrest side sections are incorporated into the "Sport" map.
The winding stretch of road is detected by the changing lateral acceleration.
This change will also be incorporated into the E60/E61 at a later date.
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.