This is a 4x4 Mercedes Sprinter 144"
It was a custom build for a pro adaptive big wave surfer, so there are hand controls and wheel chair accessible features.  These features can easily be removed and the vehicle brought back to stock in a few hours.  Below is a list of the build items included in this amazing custom van build.  

2021 Summit / Antero Vans Offroad Inclusive Addition Prototype Van

20,279 miles

1. Mercedes-Benz Sprinter Chassis
2. 2500 High roof 144" Wheelbase
3. 3.0 L6-Cylinder turbo diesel 4x4 188 hp
4. 7G Tronic Plus 7-speed automatic transmission
5. 5,000 Ibs Max towing capacity*
6. 4 Wheel ABS braking system
7. MB Cab Features
8. Keyless start
9. Swiveling/heated captains chairs
10. Automatic car passing sensors and stay on the road auto drive / corrections and
distance / speed control behind the car in front of you.
11. Outside temperature gauge
12. USB-C socket, 5V
13. 7 t o uch sc re en
14. Rearview backup camera
15. Blind spot assist
16. Innovation Mercedes-Benz User Experience
17. Live traffic information navigation system
18. Smartphone Integration for Apple Carplay and
19. Android Auto
20. MB Convenience Package
21. Multifunction Steering Wheel
22. Cruise Control
23. Keys, two additional masters
24. 12v power outlet, driver seat base
25. Electrically folding exterior mirrors
26. Hinged lid for storage compartment
27. Attention Assist
28. Heated and electrically adjustable exterior mirrors
29. Blind Spot Assist
30. MB Premium Package
31. Wet wiper system
32. Rear view camera (head unit display)
33. Active Brake Assist
34. Active Lane Keeping Assist
35. MBUX Multimedia System with 7" Touchscreen
36. Rain Sensor
37. MB Comfort Package
38. Comfort head restraint, driver and passenger's seat
39. Comfort headrest, driver and passenger's seat
40. Comfort seat, driver and passenger's seat
41. Lumbar support, driver and passenger's seat:
42. Armrest, driver and passenger's seat
43. Comfort overhead control panel
44. Interior
45. Exclusive SMART FLOOR foundational flooring and
46. track system
47. DAY-DREAMER sleep/eat/work at flex space
48. 2-piece high density foam mattress
49. GEARage storage space
50. Inside/outside cafe table
51. Flexible wall storage
52. Optional removable passenger seats (up to 6)
53. Rolef screen door kit w/ magnetic walk-thru
54. Cab and coach privacy screens
55. Bluetooth receiver and speakers in coach
56. Galley
57. 4.6 cu ft refridgerator/freezer
58. Induction cooktop
59. 700 watt microwave
60. Custom cabinetry/pantry
61. Steel wall surfaces for magnet accessories
62. 18 gallon fresh water tank
63. 25 gallon grey water tank
64. 10" deep bar sink w/ spray faucet and cutting board
65. 2 extra deep drawers
66. HVAC
67. Fuel-fired heater with thermostat and altimeter for
68. efficient burn
69. Roof vent fan
70. Slide-vented windows
71. Power and Energy Storage
72. 2 - 12 volt Lithium lon Coach Batteries
73. 2,000 watt Inverter/Converter
74. 30 amp shore power plug