Initializing after a power failure
After a power failure during the opening or closing process, the roof can only be operated to a limited extent.
Initializing the system
The system can be initialized when the vehicle is stationary and the engine is running.
Danger of pinching
Monitor the closing process and make sure that the closing path of the glass sunroof is clear; otherwise, injuries may result.

Press the switch up and hold it until the initialization is complete:
- Initialization begins within 15 seconds and is completed when the sunroof and sliding visor are completely closed.
- The roof closes without pinch protection.
See also:
Comparison with ordinary remote
control
The functions can be controlled by pressing the
buttons or via Comfort Access.
Unlocking
Fully grasp a door handle, arrow 1. This corresponds
to pressing the button.
Locking
Press the ...
Message when the system was notreset
A Check Control message is displayed.
The system detected a wheel change but was
not reset.
Warnings regarding the current tire inflation
pressure are not reliable.
Check the tire inflation ...
Under the Hood
The 640i is powered by a 315-horsepower, turbocharged 3.0-liter six-cylinder
engine. Its peak torque rating is 332 pounds-feet. BMW cites a zero to 60 mph
time of 5.5 seconds for both the coupe an ...
