I’m installing a car alarm on my ’85 190e this weekend and I need to know how to access the ignition switch wiring harness. I want put in a starter kill switch and have to cut the starter (violet/white) and ignition (Red/Black) wires. Does anyone know where I can locate these two wires?

Also does anyone know how to hook-up remote door locks. I’ve never worked with a vacuum locking system before. Do you have to add an actuator or can you wire up an existing actuator in the door. I’ve noticed that each one has 3 wires going into it. Has any one done this?

Thanks