It sounds as if the ECW chip inside you key is bad. this is the chip that talks to your car and tells the vehicle that the key is the proper key. The cut of the key is right so it will unlock the tumblers, and let you turn the ignition switch, but the car needs that signal from chip to tell it to start. you will need to replace the key at the dealership. about ($120-$190). The keys on websites wont work they may be cut right but only BMW has the key with the proper signal to start the car.
Start by replacing the Flasher Relay.
Short
yes. as long as everything works on the car. lights, blinkers ect yes as long as everything works . lights, blinkers, ect...
Does the engine crank but not start? Or does it not even crank? Based on the information you gave, you could have a bad starter or weak battery. Dead battery. Recharge it or get a new one.
Bulbs burned out? They are double filamented.
there is a short in the relay for the head lights
Yes, everything that works for the DS Lite works on the original DS unless it can't fit
Check the light switch. Resistor coil for dimming may be broken. Dome light and everything else worked on mine but the light switch was broken at the start of the resistor coil.
there might be something wrong with your starter or alternator
Car battery is run down.
The price range for the original Xbox that works but has wear and tear is around $50 to $80 dollars.
check fuses then check all the bulbs, then check the turn signal switch the brake lights work through it