I recently purchased an old BMW 318is (1994 model, so it really is old) and received two pairs of keys.
The keys come with a silver and black pad that has 4 buttons on it. I'm not sure what each button does and some guidance would be appreciated. As far as I can tell the opened keypad button is to disable the car's immobiliser and that's as far as I've gotten.
The key itself has a button on it too but it's broken. What does the broken button do and is it worth repairing it?
p.s. Googling for the keys didn't yield a single photo of the same keypad.