Mercedes Sprinter SL104 Driver Side Rear Quarter Window Installation Guide

Step-by-step Mercedes-Benz Sprinter SL104 installation guide covering SL104-AW, SL104-F, SL104-SE, and SL104-DS driver side rear quarter windows for 2007–2026 Sprinter 144" wheelbase vans.

What Is the Mercedes Sprinter SL104 Window Position?

The SL104 window position is the driver side rear quarter of the Mercedes-Benz Sprinter with the 144" wheelbase.

This is the rear body section behind the driver-side living or cargo area, immediately ahead of the rear cargo door.

Mercedes Sprinter SL104 Fitment

Current Van Windows Direct fitment for the SL104 family is:

• Vehicle: Mercedes-Benz Sprinter Van
• Model Years: 2007–2026
• Wheelbase: 144"
• Roof Height: Low Roof or High Roof
• Position: Driver Side Rear Quarter

The current overall window size listed for the SL104 family is approximately 1631 mm x 768 mm, or roughly 64.21" x 30.24".

Important: Will Not Work With a Driver Side Sliding Door

Available SL104 Window Models

SL104-AW Premium Awning Window

The SL104-AW is the premium top-hinged awning option for the Sprinter driver side rear quarter.

It features a large outward-opening awning section, integrated insect screen, solar privacy glass, and urethane-bonded installation.

Current specifications list an opening of approximately 37-3/8" wide x 16-5/8" high.

Shop SL104-AW Premium Awning Window

SL104-F Fixed Glass Window

The SL104-F is the fixed-glass option for the driver side rear quarter.

It uses grey solar privacy glass and provides a clean, OE-style exterior appearance without moving hardware.

Shop SL104-F Fixed Glass Window

SL104-SE SE-Series Sliding Window

The SL104-SE provides adjustable rear-quarter ventilation with an integrated insect screen and clean exterior appearance.

Current specifications list an opening of approximately 552 mm x 451 mm, or roughly 21.75" x 17.75".

Shop SL104-SE Sliding Window

SL104-DS Double-Sliding Window

The SL104-DS provides two independently sliding glass panels for increased control over rear-cabin airflow.

It includes an integrated bug screen, privacy shade, solar privacy glass, and urethane-bonded installation.

Shop SL104-DS Double-Sliding Window

Tools and Materials Needed

• One-handed reciprocating saw, pneumatic air saw, or compact body saw
• Thin-metal automotive cutting blade
• Metal file or deburring tool
• Safety glasses
• Work gloves
• Vacuum
• Clean shop cloth
• Automotive primer or suitable urethane primer
• Trim-Lok edge molding
• Automotive glass urethane
• High-ratio urethane gun
• Window-support or masking tape

Mercedes Sprinter SL104 Rear Quarter Cutout Overview

The illustrated red line identifies the approximate inner sheet-metal area that must be removed from the Sprinter driver side rear-quarter panel.

Use the factory body stamping, the illustrated guide, and the actual SL104 window together when verifying the cut area.

After cutting, the exposed opening should be:

1. Filed smooth
2. Deburred
3. Protected against corrosion
4. Finished with Trim-Lok edge molding
5. Cleaned thoroughly
6. Dry-fit with the actual SL104 window before urethane is applied

Step-by-Step Mercedes Sprinter SL104 Window Installation

Step 1 — Verify the Driver Side Rear Quarter Position

Confirm that you are working on the driver side rear quarter of a 144" Sprinter.

Confirm that the van does not have a driver-side sliding door in this position.

Inspect the inside of the van for:

• Wiring
• Insulation
• Factory brackets
• Interior walls or panels
• Aftermarket equipment

Step 2 — Identify the Inner Sheet Metal to Remove

Use the factory stamped panel and illustrated red line to identify the approximate inner sheet-metal area requiring removal.

Compare the opening with the actual SL104 window before cutting.

Step 3 — Cut From Inside the Van When Possible

Whenever practical, perform the cutting operation from inside the van.

Working from the interior provides better visibility of the stamped structure and helps reduce the risk of damaging the exterior painted body surface.

Suitable cutting tools include:

• One-handed reciprocating saw
• Pneumatic air saw
• Compact automotive body saw

Use a blade intended for thin automotive steel and work slowly.

Step 4 — Remove the Cut Sheet-Metal Section

Once the required perimeter is completely cut, carefully remove the unwanted inner sheet-metal section.

Inspect the opening for:

• Remaining tabs
• Sharp points
• Raised metal
• Saw burrs
• Irregular cut areas

Step 5 — File and Deburr the Opening

Use a metal file or deburring tool around the complete opening.

Remove sharp points, burrs, lifted edges, and high spots.

The finished edge should be smooth enough that it does not interfere with the window or Trim-Lok edge molding.

Step 6 — Protect the Raw Steel

Freshly cut automotive steel should not remain exposed.

Apply an appropriate corrosion-protection coating to the cut edge.

Suitable options may include:

• Automotive rattle-can primer
• Automotive touch-up primer
• Urethane-compatible primer where appropriate

Follow the primer manufacturer's specified dry or flash time.

Install Trim-Lok Edge Molding

Once the sheet-metal opening has been cut, deburred, and protected, install Trim-Lok edge molding over the finished edge.

Trim-Lok helps:

• Cover sharp cut edges
• Protect the finished sheet metal
• Improve the interior appearance
• Conceal small cutting irregularities
• Create a cleaner finished opening

Trim Reference: Use a close crop showing the Trim-Lok and sheet-metal interface so customers can clearly understand how the finished edge should look.

Step 7 — Clean the Rear Quarter Body Cavity

Vacuum the opening and surrounding body cavity thoroughly after cutting.

Remove all metal shavings before the window is installed.

Step 8 — Dry-Fit the SL104 Window

Before applying urethane, position the actual SL104-AW, SL104-F, SL104-SE, or SL104-DS into the prepared opening.

Inspect the complete perimeter for proper clearance.

The window should sit naturally against the intended body surface without contacting unintended inner sheet metal.

If interference exists:

1. Remove the window
2. Identify the contact point
3. Carefully adjust the opening
4. File the new cut
5. Re-prime exposed metal
6. Reinstall edge molding where needed
7. Dry-fit again

Urethane-Bonded SL104 Installation

SL104-AW, SL104-F, SL104-SE, and SL104-DS all use urethane-bonded installation.

Prepare the body and glass bonding surfaces according to the requirements of the automotive urethane system being used.

This commonly includes:

• Cleaning the body bonding surface
• Cleaning the glass bonding surface
• Applying required body primer
• Applying glass primer when required
• Allowing proper flash time

Apply a continuous automotive glass urethane bead around the required bonding perimeter.

Avoid gaps, thin spots, and inconsistent bead height.

Step 9 — Install the SL104 Window

Carefully place the window into the prepared opening.

Apply even pressure around the perimeter so the urethane bead makes consistent contact.

Support or tape the window during curing according to the urethane manufacturer's instructions.

Do not drive the vehicle until the adhesive has reached the manufacturer's specified safe-drive-away time.

Common Mercedes Sprinter SL104 Installation Mistakes

Installing on a Driver Side Sliding Door Van

SL104 windows are not compatible with the driver-side sliding-door configuration. Confirm the body configuration before ordering or cutting.

Using the Wrong Wheelbase

SL104 is designed for the 144" wheelbase.

Cutting Too Much Sheet Metal

Remove only the amount of material required for proper window clearance.

Skipping the Dry Fit

Always dry-fit the actual SL104 window before applying urethane.

Leaving Burrs Around the Opening

File the entire cut perimeter before installing edge molding.

Leaving Bare Steel Exposed

Protect freshly cut steel with suitable automotive corrosion protection.

Leaving Metal Shavings Inside the Van Wall

Vacuum the body cavity thoroughly after cutting.

Shop Mercedes Sprinter SL104 Driver Side Rear Quarter Windows

Frequently Asked Questions

What position is SL104?

SL104 is the driver side rear quarter position on the Mercedes-Benz Sprinter 144" wheelbase.

What Sprinter years does SL104 fit?

Current VWD listings specify 2007–2026 Mercedes-Benz Sprinter vans.

What wheelbase does SL104 fit?

SL104 is designed for the 144" wheelbase.

Does SL104 work with a driver side sliding door?

No. SL104 is not compatible with Sprinters equipped with a driver-side sliding door.

Which SL104 models are available?

Current VWD models include SL104-AW, SL104-F, SL104-SE, and SL104-DS.

What size are SL104 windows?

Current SL104 product specifications list an overall size of approximately 1631 mm x 768 mm, or about 64.21" x 30.24".

Should freshly cut steel be primed?

Yes. Freshly exposed steel should receive suitable automotive corrosion protection.

Should Trim-Lok edge molding be installed?

Trim-Lok helps protect the cut edge and creates a cleaner interior finish.

Should the SL104 window be dry-fitted before urethane installation?

Yes. Always verify complete clearance and positioning before applying automotive glass urethane.

What adhesive is used for SL104 windows?

Current SL104 windows use a urethane-bonded installation with suitable automotive glass urethane.

Final Mercedes Sprinter SL104 Installation Notes

A proper SL104 installation requires careful preparation of the Sprinter driver-side rear-quarter panel.

Verify the 144" wheelbase and body configuration, confirm that the van does not have a driver-side sliding door, carefully cut the required sheet metal, file and protect the exposed edge, install Trim-Lok, clean the body cavity, dry-fit the actual window, and follow the urethane manufacturer's bonding and cure instructions.

Whether you choose the SL104-AW, SL104-F, SL104-SE, or SL104-DS, always verify the actual Sprinter and exact window before making permanent modifications.