Sprinter Door speaker upgrade with Infinity reference 6500cx - YouTube
Jehnert Door/Center/A-Pillar Speaker Upgrade Kit for 2019+ Mercedes Sprinter (65780)
Pair of Speaker Adapters for 6.5" speakers to fit 2007-18 Sprinter NCV – DIYvan
ETON UG MB SF2.1 Plug & Play Component Speaker Set, Compatible with Mercedes-Benz Sprinter (VS30), Includes Centre Speaker, Front System Ideal for Caravans, Vans and Campers : Amazon.de: Electronics & Photo
Mercedes Benz Sprinter Front Door speakers Alpine 17cm 6.5" car speaker kit 220W | eBay
How to replace Sprinter door and dash speakers - Sprinter Adventure Van