I have 1984 M635CSI. I has had all of the gremlins taken out of her within the last 10 years. She has 55k on her speedometer. I took the garage queen out for a 1 mile spin. Windows down, radio on-off, second gear warm up. I just wanted to work all of the moving parts, keeping her in prime shape. Traveling down the road about 25mph she just died...........so did I. Checked the fuses, relays etc. Might be fuel related, pump, relay, maybe computer?. She was running sooooo well I just can not believe it!!. Any thoughts? (fuel tank is 1/4 full). When the ignition switch is on should the pump be on? I don't think so, only when the car is on.....?I hate to leave her out for the next couple of days. If any one has an idea I would really appreciate it!