See also:

Socket for OBD Onboard Diagnosis
Socket for OBD Onboard Diagnosis On the driver's side is an OBD socket for checking the primary components in the vehicle emissions. ...

Jump-starting
If the car's own battery is flat, your BMW's engine can be started by connecting two jumper cables to another vehicle's battery. You can also use the same method to help start another ...

Coolant level
Checking 1. Let the engine cool. 2. Turn the cap of the expansion tank slightly counterclockwise to allow any excess pressure to dissipate, and then open it. 3. The coolant level is correct if ...