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It looks like your 2020 Mercedes-Benz Sprinter 1500 is going to need parts that aren't necessarily confirmed to fit, as you've found with your research and the Curt Trailer Hitch Receiver # 13358.
For the wiring I recommend using the ZCI Circuit Protected Vehicle Wiring Harness # 119250KIT because it uses clamps for your OEM wiring so you don't have to splice into the factory circuits and potentially mess something up. The clamps then "sense" when to send power... view full answer...
To get a hitch installed on your 2023 Mercedes-Benz Sprinter 1500 you're going to need to work with a local shop to get a hitch like the Draw-Tite # 41990-07 fabricated to your frame. There aren't any custom fit options so you'll need the shop to check the trailer hitch design with your vehicle to ensure it will work properly. view full answer...
Yes, the Curt Trailer Hitch Mounted Spare Tire Carrier # C31006 will work for the 16" spare for your 2020 Mercedes-Benz Sprinter. This is a universal spare tire carrier so it will be able to handle your wheel size and bolt pattern without any issues. view full answer...
The best bike rack to use with your 2022 Mercedes 1500 Sprinter Van is going to be the Hollywood Racks Sport Rider SE Bike Rack for 2 Electric Bikes item # HLY84FR. This rack is rated to be used on both a van and a motorhome. It has an 80 lbs capacity per bike. It has a keyed-alike hitch lock, frame hooks, and security cable to prevent theft of your bikes and the rack itself. view full answer...