The vehicles are:

SdKfz 222 by Dragon
S dKfz 251 by First to Fight
SdKfz 250 by MK72
Motorcycle by Italeri

I converted the FTF 251 from Ausf A to B by adding a spare Revell MG shield and carving off the tools and vision port visors and hiding the scars under stowage.

I used Woodland Scenics rock molds to make the rocky outcrops.
Pegasus make the cacti.
For ground cover I used grit foraged from various construction sites.

The figures are Italeri and AB Miniatures.