Garmin dash mount and 12v DC plug...
I have never really trusted the self adhesive option of putting the mount on the dash - can only think vibration and heat will cause it to come adrift, which would be a real pain - and potentially damage the unit as it falls.
On my last 110 and current 130 I drilled down through the vinyl dash pad through the metal layer below and used self tappers screwed in to glue.
I find the Garmin mounts a bit of a pain to remove and re-attach the 276C on a regular basis - I might consider a RAM mount as they have a good reputation - but would need to see one first.
Concerning the 12v DC lead which I placed behind trim and wired with fuse to aux battery. The moulded plug at the GPS end design is dodgy !
The bottom half of the plug can pull out from the main body of the plug - if you lose it or cannot get it back on being careful not to bend or snap the delicate metal contacts which need to be slid in to the female bit you could be well stuffed in the middle of nowhere.
I ran a seam of glue around the plug join - hopefully that will prevent problems, as pulling the plug out takes quite a jerk - or maybe it's just me !
Land Rover Defender 130 camper