How to Install the Owl B2 Flex for the Sprinter

Before You Start

The B2 Flex fits 2019 and newer Mercedes-Benz Sprinter (VS30) vans, 144" and 170" wheelbase, 2500 and 3500, 2WD and 4x4, including Sprinter-based builds such as the Winnebago Revel, Storyteller Overland, Thor, Airstream, Tiffin GH1 and Jayco Terrain.
The carrier mounts to the factory rear door hinges and to one drilled point in each rear door. Drilling is required.
Check your hinges before you start. Some vans require the Owl hinge swap. If your hinges are not the correct style, stop and contact Owl before drilling anything.
Work one door at a time. Never remove all of the hinge bolts at once. Leaving the middle bolt in place keeps the door aligned.
Plan on roughly two to three hours for both doors.

Tools and Supplies

Passenger Side Installation

Step 1: Remove the Door Panel

Use a plastic trim tool or your fingers to pop the interior door panel off, pulling straight out so the clips do not break.
Set the panel and any hardware aside.

Step 2: Install the Hinge Brackets

Locate the bolts on the upper and lower door hinges.
Remove the outer bolts and leave the middle bolt in place so the door stays aligned.
Place the supplied washers on the new bolts from the B2 Flex hardware kit.
Slide the billet aluminum bracket over the remaining middle bolt, then start the new bolts by hand. Leave everything loose for now.
Repeat on the second hinge.

Step 3: Hang the B2 Flex Chassis

With a second set of hands, lift the B2 Flex chassis into position against the hinge brackets.
Start the chassis bolts with a washer on each, top and bottom, and leave them loose so the chassis can still move.
Raise and lower the chassis until it sits square to the door, then snug the bolts without fully tightening them.

Step 4: Mark and Drill the Door

Set the bushing in its location on the chassis to locate the drill point on the door.
Mark the center of that point with a punch or a marker.
Loosen the chassis bolts and swing the chassis clear of the door.
Drill a small pilot hole on the mark, then step up to a bit slightly larger than 3/8".

Step 5: Seal the Hole

Wipe the area clean and spray the inside of the drilled hole with rust preventative paint.
Let it dry before moving on.

Step 6: Install the Door Plate and Bushing

Clean the door surface with isopropyl alcohol.
Peel the adhesive backing off the door plate, align it over the drilled hole and press evenly across the whole plate.
Insert the bushing through the plate and into the hole.

Step 7: Install the Inner Door Bracket

From inside the door, position the inner door bracket so its slotted hole lines up with the bushing.
Run the bolt through the bushing into the bracket, then secure it with a washer and nut from the inside.

Step 8: Final Tighten and Test

Apply blue Loctite and tighten the hinge bracket and chassis bolts. Snug is enough, do not overtighten.
Confirm the bushing is snug but not crushed.
Push and pull on the chassis. It should feel solid with no movement.
Open and close the door and check clearance at the bumper and body.
Reinstall the interior door panel.

Driver Side Installation

The driver side follows the same sequence as the passenger side, mirrored.
Finish the passenger door first and leave it closed while you work the driver door so you can check alignment between the two halves.
Before final tightening, close both doors and confirm the two halves line up and the latch engages cleanly.

After the Install

Re-check every bolt after the first 100 miles, then at every oil change.
Add panels and accessories only after both chassis halves are fully tightened and aligned.
Do not exceed the rated load for the panel or carrier you are running.

Need Help?

Contact the Owl team or book an install at one of the Owl-owned install centers.

How to install the Owl B2 Flex rear door carrier on a 2019+ Mercedes Sprinter, driver side and passenger side.