Choosing the Right Fiamma F45S Awning Size for Your Sprinter Van & Orion Roof Rack

When it comes to equipping your Mercedes Sprinter with the perfect roof rack and awning setup, selecting the right Fiamma F45S awning size is key. The Orion Van Gear Sprinter roof rack is designed not only for durability and strength but also for seamless awning integration.

In this post, we’ll break down how to choose the best Fiamma F45S awning size for your Sprinter wheelbase.

Why Choose the Fiamma F45S for Your Sprinter?

The Fiamma F45S awning is one of the best choices for Sprinter vans due to its:

✅ Durability – Built to withstand the elements, ideal for van life and overlanding.
✅ Ease of Use – Extends and retracts effortlessly, with manual or motorized options.
✅ Perfect Fit for Orion Roof Racks – No extra brackets needed—mounts directly using the included Fiamma brackets for a sleek, aerodynamic look.

Fiamma F45S Awning Size Guide for Sprinter Vans

To ensure the best fit, we’ve outlined the maximum recommended awning sizes based on your wheelbase.

Fiamma F45S Size	Compatible Sprinter Wheelbase
F45S 300	Sprinter 144 (Only Recommended)
F45S 350	Sprinter 170 (Standard Fit)
F45S 400	Sprinter 170 (Max Recommended)
F45S 400	Sprinter 170 EXT (Standard Fit)
F45S 450	Sprinter 170 EXT (Max Recommended)

These awning sizes provide optimal coverage while maintaining proper aerodynamics and a clean, factory-like fit with the Orion Roof Rack’s integrated mounting slot.

Manual vs. Powered Fiamma F45S Awnings – Positioning Considerations

💡 The image above shows only the manual crank version of the Fiamma F45S.

If you’re considering the powered version, note that the motorized unit adds roughly 5 inches to the front of the awning. This extra length affects positioning, particularly if you want the awning to cover the slider door:

• With the motorized version, the motor housing will slightly protrude beyond our front deflector if mounted in the standard position.
• If you prefer to keep the awning flush with the front deflector, you’ll need to slide it back 4 inches, which may make one size down a better fit depending on your setup.
• Each van setup is unique, which is why our modular design allows you to position the awning exactly where you need it.

Lead Time for Motorized Fiamma Awnings

If you choose the powered version, note that it adds 2-3 weeks to the lead time, as these units are made to order with the motor installed before shipping.

Which Awning Size is Best for Your Sprinter?

Sprinter 144: Fiamma F45S 300

• Ideal for compact setups and daily drivers.
• Provides ample shade without overextending past the roof rack.
• Best for those looking for a sleek, minimal look that balances coverage and maneuverability.

Sprinter 170: Fiamma F45S 350 or 400

• F45S 350: A balanced option, providing great shade without excessive overhang. Best if you have 270-degree rear doors to avoid damage.
• F45S 400: Ideal for maximum coverage, great for camping setups or extended stays. Best fit if you have 180-degree rear doors.
• Both sizes mount seamlessly to Orion racks with the standard Fiamma brackets.

Sprinter 170 EXT: Fiamma F45S 400 or 450

• F45S 400: A great fit for most 170 EXT owners looking for full-length shade. Best if you have 270-degree rear doors to avoid damage.
• F45S 450: The largest recommended size, providing full van-length coverage for ultimate protection. 
• Perfect for full-time van lifers who want the most shade possible.

💡 Fun Fact: The Orion roof rack’s built-in mounting slot ensures a flush fit with the Fiamma F45S, eliminating the need for extra mounting brackets.

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How to Mount a Fiamma F45S Awning to Your Orion Roof Rack

One of the biggest advantages of Orion Van Gear roof racks is that no extra brackets are needed—the Fiamma F45S awning mounts directly using its included brackets. That saves you money and weight for install. 

Installation Steps:

1. Use the included Fiamma Brackets – The factory-included Fiamma F45S brackets fit directly into the built-in slot on Orion roof racks—no extra adapters are required. We designed it that way on purpose ;)
2. Optimal Height & Aerodynamics – Orion roof racks are engineered for the perfect awning height, ensuring a sleek, low-profile fit that looks great and reduces wind resistance.
3. Secure & Test – Attach the brackets, tighten the hardware, and extend the awning to ensure a perfect fit and smooth operation.

💡 Fun Fact 2: Since the Fiamma brackets mount flush with our roof racks, you get a clean, professional fit without unnecessary gaps or bulky adapters.

Shop Orion Roof Racks & Fiamma Awnings

Ready to upgrade your Sprinter with the best awning setup? Check out our Sprinter Roof Racks and Fiamma F45S Awnings below:

• Shop Sprinter Roof Racks
• Shop Fiamma F45S Awnings

Final Thoughts

Choosing the right Fiamma F45S awning for your Sprinter van is all about matching your roof rack, wheelbase, and adventure needs. With Orion Van Gear’s perfectly designed mounting system, the F45S installs easily without extra brackets while maintaining a sleek, aerodynamic look.

📩 Need Help? Contact us for expert advice on your setup!