My new Caddy Wagon remote start turns on the seat heaters while I'm having coffee, still in the house. Now that is technology at its best. That would be a wiring nitemare (since I don't have seat heaters in the old Benz).
One thing I won't try is tying that pink wire to the alarm horn (to beep when locking/unlocking). After all the alarm issues from the guys here, I'm gonna leave it alone.

DG