Navidok Overlander to Overlander X Upgrade Kit - Sprinter 2019+ by Terra XPLEASE NOTE: This is an Add on if you have already purchased a NAVIDOK Overlander OVERVIEW: This is the upgrade kit allowing you to take your NAVIDOK Overlander to the next level with the NAVIDOK OverlanderX add on. The kit includes everything you need to add the dash plate and upper mounting to your existing Overlander lower dash mount. The NAVIDOK OverlanderX the only no drill dash solution to securely and conveniently mount all of your navigation