If your 2006 Dodge Sprinter does not have trailer wiring currently (since you are buying a hitch I can predict that it does not) you'd need to go with a kit like the Curt # C59236 which hardwires to the vehicle's taillight wiring. This kit will allow you to control all of the taillight functions of your trailer. view full answer...
For front suspension enhancement for your 2006 Dodge Sprinter 3500 2 wheel drive you would want the part # SSF-401-54 as it is going to give you the best anti-sway characteristics and because SumoSprings are more geared towards RV use than the Timbrens so it would give you the best sway control and support. view full answer...
The backing plate for the Recessed Trailer D-Ring Tie Down, # RR5K, is available separately. It is part # BP05. The installation hardware is not available separately, but it can be obtained at a local hardware store. It uses 2-1/4 inch long 3/8 inch carriage bolts, matching nuts, and lock washers. You would need 4 of each. view full answer...
I might have a solution for you, but if you do not have a 7-way trailer connector already installed on the rear of your 2004 Dodge Sprinter, then there is no plug and play wiring harness available.
Your best option will be to use the 4 Pole Harness, # C59496. This wiring harness with converter will allow your Sprinter to fully turn on to give your trailer lights full brightness when they are activated. The converter has a power wire coming of the positive battery to help power the trailer... view full answer...