Fix the Frame
My Guesses:
Fix the Frame - go with the RPG design, or start over.
Add a offroad performance package - Air bump, beefier springs + Fox 3.0
Fix the lights - add some integrated Vision X options, HID rpjectors should be std.
Allow the front Camera to come on in low speed parking w/o going thru all the gyrations of enabling, OR mode etc.
Install POV camera and record to HD - ok that is out there but it would be cool.
Engine is great but mileage sucks when you are just taking it easy. - I would like to compare an Ecoboost option, maybe special Raptor version, but I would worry about those turbos holding up after getting slammed on high impact landings. Maybe Supercharger on a small block v-8 say around 5 liters
Keyless ignition - I love being able to keep my keys in my pocket on my benz.
redesigned Power Steering pump/resevoir
Redesign the CAI to perform better in Water/mud
Redesign Front fender to accomdate 37" tires
Install a "Fun-O -Meter to record the hoots of joy when driving this amazing machine!