From The E28 Wiki
Check Brake Lights Come On at Every Start
By Tjn182, Mon Feb 13, 2006
Original thread: Check brake lights come on every time the car starts
Problem: Check brake lights come on every time the car starts
Cause: Every e28 does this at startup.
Solution: Push your brake pedal and the light goes away - every e28 does it, there's nothing wrong with your car.
How can you tell?: You look at it every time you start your car :)
