GeorgeRa
2013 Sprinter DIY 144WB, Portland OR
I like your spot, I wish I have 2, one like yours and the other one like mine near sliding door.I mounted mine under the passenger seat after reading some helpful tutorials from this site. For what's it's worth I ended up running the thermostat control wires up the seatbelt pillar and mounted the unit in the headliner. I love it there as i can turn it on a few mins from a camp spot. Only 2 down sides are you can't reach it from the bed, and if you use a curtain separating the cab the unit won't read an accurate temp (but you could disable that function if you wanted)
George.