For the Ducato (Promaster) leave it in gear when you turn off the engine (not in the N position): do not rely only on your handbrake when parked! The handbrake together with the gears brakes the vehicle from moving when parked.

This DIY device reminds you to pull up and engage your parking brake when your engine is off.

This DIY device uses a microswitch and a relay and the parts used can be purchased through these links (for Australian viewers):

Parts from Bunnings:
metal bracket: https://www.bunnings.com.au/carinya-2...

https://www.bunnings.com.au/pinnacle-...

Parts from Jaycar:
microswitch: https://www.jaycar.com.au/spdt-250vac...

piggyback fuse wire tap: https://www.jaycar.com.au/double-micr...

miniature horn relay: https://www.jaycar.com.au/spdt-30a-ho...

rocker switch with light: https://www.jaycar.com.au/spst-round-...

black plastic box: https://www.jaycar.com.au/bulkhead-bl...

crimp connecters: https://www.jaycar.com.au/quick-conne...