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.
Opening and Closing
The Car Access System 4 has the central control function for electric opening and closing of the power windows.
This means that the Car Access System 4 issues the enable to open and close the power windows. The footwell module and the junction box electronics actuate the power window motors and monitor the motor speed of the respective power window motor. This means the footwell module or the junction box electronics can respond to the following operating situations:
- Trapping
- Overheating of the power window motor
- Blocking of power window motors.
The corresponding power window motor is activated in OPEN or CLOSE direction by pressing or pulling the power window switches to the first notch position. The power window motor remains active until the corresponding power window switch is released.
To ensure the power window is closed reliably, the power window motor is briefly driven to block status at the upper stop.
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.