Mercedes GLS Roof Rails: Ultimate Essential Upgrade

Mercedes GLS Roof Rails: The Ultimate Essential Upgrade for Versatile Adventures. Installing roof rails on your Mercedes-Benz GLS significantly expands its cargo capacity and utility, making it perfect for hauling gear for family road trips, outdoor hobbies, or even DIY projects. This guide simplifies the process, ensuring a secure and stylish enhancement for your luxury SUV.

Your Mercedes-Benz GLS is a marvel of engineering, designed for comfort, performance, and luxury. But what if you need more space for that weekend ski trip, your camping gear, or even a kayak? The answer often lies in optimizing your vehicle’s exterior. Mercedes GLS roof rails aren’t just an accessory; they are an essential upgrade that unlocks a new level of versatility for your SUV. Many GLS owners find themselves wishing for more cargo space, especially for bulky items that don’t fit inside. This guide will walk you through everything you need to know about Mercedes GLS roof rails, from understanding their benefits to ensuring a proper installation, making your GLS even more capable.

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Why Mercedes GLS Roof Rails Are a Game-Changer

Adding roof rails to your Mercedes-Benz GLS is more than just a cosmetic change; it’s a functional enhancement that dramatically boosts your vehicle’s utility. Think of them as the foundational layer for any adventure or hauling need.

Expanding Your Cargo Capacity

The most obvious benefit is increased carrying capacity. The GLS is spacious, but for larger items like kayaks, skis, bicycles, or camping equipment, interior space can quickly become limiting. Roof rails provide a stable, secure platform to mount a variety of carriers, effectively doubling your usable cargo space when needed.

Versatility for Every Lifestyle

Whether you’re a weekend warrior hitting the trails, a family planning a cross-country road trip, or a DIY enthusiast needing to transport building materials, roof rails adapt to your needs. They are the starting point for a modular system that can accommodate different types of cargo.

Seamless Integration and Style

Mercedes-Benz designs its accessories to complement the vehicle’s aesthetic. GLS roof rails are engineered not only for function but also to integrate seamlessly with the GLS’s sleek lines, enhancing its already luxurious appearance. They often come in finishes that match your vehicle’s trim, maintaining that premium look.

Preserving Interior Space and Cleanliness

By moving bulky, dirty, or wet gear to the roof, you keep your GLS’s pristine interior free from scratches, dirt, and odors. This is particularly beneficial for outdoor enthusiasts or anyone transporting items that might otherwise compromise the cabin’s comfort and cleanliness.

Potential for Increased Resale Value

A vehicle equipped with desirable, factory-approved accessories like roof rails can sometimes command a higher resale value. They signal that the vehicle is well-maintained and equipped for a wider range of uses, appealing to a broader pool of potential buyers.

Understanding Your Mercedes GLS Roof Rail Options

For the Mercedes-Benz GLS, there are typically two main types of factory-compatible roof rail systems:

Factory-Installed (Original Equipment Manufacturer – OEM)

If your GLS came with roof rails from the dealership, you have the OEM system. These are precisely fitted and designed to integrate perfectly with your vehicle’s roof structure. They are often the easiest to work with as they meet Mercedes-Benz’s stringent quality and safety standards.

Aftermarket (Direct Fit / Compatible)

Numerous reputable aftermarket manufacturers produce roof rails specifically designed for the Mercedes-Benz GLS. These can be a more budget-friendly option or offer specific features not found on OEM rails. It’s crucial to choose aftermarket parts from well-respected brands known for quality and compatibility to ensure a secure fit and optimal performance. Always verify that the aftermarket rails are certified for your specific GLS model year.

Types of Roof Rails for Your GLS

Within these options, you’ll encounter different styles of rails:

Flush Rails

These are the most common on modern SUVs like the GLS. They run along the length of the roof, hugging the contour of the vehicle with minimal gap. They offer a sleek, integrated look and are excellent for aerodynamics. Many GLS models come standard with these or have them as an option.

Pros:

Sleek, integrated appearance.
Improved aerodynamics compared to raised rails.
Less wind noise.
Good base for most crossbars and cargo accessories.

Cons:

May offer slightly less flexibility for certain clamp-on accessories compared to raised rails.

Raised Rails

These rails stand off from the roof, creating a channel between the rail and the vehicle’s sunroof/body. They offer more mounting flexibility, especially for accessories that require clamping around the rail. However, they can be slightly more prone to wind noise and may not offer the same sleek aesthetic as flush rails.

Pros:

Versatile for a wider range of accessories.
Can offer a more rugged, utilitarian look.

Cons:

Can be noisier due to increased wind flow.
May not integrate as seamlessly with modern SUV designs.

For the Mercedes GLS, flush rails are the prevailing design, offering a perfect blend of form and function.

What You’ll Need: Tools and Materials

Before you begin, ensure you have the necessary tools and materials. The exact requirements can vary slightly depending on whether you are installing OEM rails or a specific aftermarket kit, so always consult your product’s manual.

Essential Tools:

Measuring Tape: For precise positioning.
Torque Wrench: Crucial for tightening bolts to the manufacturer’s specifications to prevent damage or loosening. A calibrated torque wrench ensures safety and structural integrity. You can find reliable torque wrenches at reputable automotive tool suppliers.
Socket Wrench Set: With various metric socket sizes (commonly 10mm, 13mm, 15mm) to fit the bolts. Ensure you have deep and standard sockets.
Screwdrivers: Phillips and flathead, for removing trim pieces or securing components.
Plastic Trim Removal Tools: To safely pry off interior or exterior trim panels without scratching or damaging them. These are highly recommended to avoid damaging your GLS’s premium interior.
Rubbing Alcohol or Degreaser: For cleaning mounting surfaces to ensure a strong bond if adhesive is involved.
Clean Microfiber Cloths: For cleaning and drying surfaces.
Safety Glasses: To protect your eyes.
Ladder or Sturdy Step Stool: To safely reach the roof of your GLS.

Materials (Typically Included in Kits):

Mercedes GLS Roof Rails (Left and Right)
Mounting Brackets and Hardware (bolts, washers, nuts)
Gaskets or Sealant (if required for waterproofing)
Installation Manual/Instructions

Step-by-Step Guide: Installing Mercedes GLS Roof Rails

Installing roof rails on a Mercedes-Benz GLS typically involves modifying the existing points on the roof or attaching them to pre-designated areas. Many GLS models come with factory mounting points hidden under small covers. This guide assumes you are installing rails that utilize these pre-existing points, which is common for OEM and high-quality aftermarket kits.

Disclaimer: While this guide provides general steps, always refer to the specific installation manual for your Mercedes GLS roof rails. Incorrect installation can lead to damage, leaks, or safety hazards. If you are not comfortable with any step, professional installation is recommended.

Step 1: Prepare the Vehicle and Identify Mounting Points

Park your GLS on a level surface in a well-lit area. Ensure the vehicle is clean, especially the roofline where the rails will attach.

Locate Mounting Points: On the roof of your GLS, along the designated rail locations (usually towards the front and rear of the cabin), you will find small, often black, plastic covers. These conceal the factory-installed mounting points.
Remove Covers: Using your plastic trim removal tool or a small flathead screwdriver, carefully pry off these covers. They usually pop off with gentle pressure. Be patient and work slowly to avoid breaking the clips.

Step 2: Install Mounting Brackets (if applicable)

Some systems require attaching brackets to the vehicle’s roof structure at the exposed mounting points. Others might have integrated mounting points on the rail itself.

Clean the Area: Ensure the mounting area inside the revealed channels is clean and free of debris.
Attach Brackets: If your kit includes separate brackets, align them with the pre-drilled holes or mounting studs in the roof.
Secure Loosely: Insert the provided bolts and washers. Do not tighten them completely yet. Allow for some adjustment in the next steps.

Step 3: Position the Roof Rails

This is a critical step for alignment and ensuring a secure fit.

Align the Rail: Take one roof rail (ensure you have the correct left and right sides, as indicated in your manual). Align its mounting holes with the corresponding brackets or mounting points on the roof.
Start Threading Bolts: Gently place the rail in position. Insert a few bolts through the rail and into the brackets or mounting points. Again, do not tighten fully. This allows you to make minor adjustments.
Repeat for Other Rail: Install the second roof rail in the same manner. Ensure both rails are roughly in their final positions.

Step 4: Final Alignment and Tightening

With both rails loosely attached, it’s time to ensure they are perfectly straight and then securely fastened.

Check Alignment: Step back and visually inspect the rails from different angles. Ensure they are parallel to each other and aligned with the vehicle’s body lines. Use your measuring tape to confirm consistent distances between the rails at the front and rear.
Tighten Bolts Gradually: Using your socket wrench, begin tightening the bolts. Tighten them in a star or alternating pattern across the rail and then between the rails. This ensures even pressure distribution.
Use Torque Wrench: Once the bolts are snug, use your calibrated torque wrench to tighten them to the exact specification outlined in your installation manual. Overtightening can strip threads or crack components, while undertightening can lead to a loose and unsafe installation.

Step 5: Install End Caps and Final Touches

Most roof rail systems have end caps that cover the mounting hardware, providing a finished look and protecting the fixings.

Attach End Caps: Snap or screw the end caps into place over the mounting points. Ensure they fit snugly and are flush with the rail.
Check for Gaps/Seals: If your installation involved any sealing, ensure it looks neat and effective. Some systems rely on rubber gaskets to prevent water ingress; confirm these are properly seated.
Final Inspection: Give the rails a firm push and pull to check for any movement. Ensure all hardware is tightened and all covers are in place.

Waterproofing and Sealing Considerations

For any roof-mounted accessory, proper waterproofing is paramount to prevent leaks into your GLS’s cabin.

Built-in Seals: Many OEM and high-quality aftermarket roof rails come with integrated rubber seals or gaskets designed to conform to the vehicle’s roofline and keep water out. Ensure these are present, properly seated, and not damaged.
Silicone Sealant: In some aftermarket installations, you might be instructed to apply a bead of automotive-grade silicone sealant around the mounting points before attaching the rails. This provides an extra layer of protection against water ingress. If using sealant, apply it carefully and neatly, and allow it to cure as per the product’s instructions before driving. Reputable automotive sealants can be found at most auto parts stores.

Installing Crossbars on Your GLS Roof Rails

Roof rails are the foundation, but it’s the crossbars that actually carry your gear. Crossbars (also known as racks or load bars) span between the left and right roof rails.

Types of Crossbars:

In-the-Rail Crossbars: These are designed to clamp onto the side of the roof rail. They are common for flush rails.
Over-the-Rail Crossbars: These are less common for flush rails and are typically used with raised rails, clamping under the rail.
Integrated Crossbars: Some systems might have crossbars that appear to be permanently attached to the rails, offering a very streamlined look.

Installation of Crossbars:

The process for installing crossbars is generally straightforward but varies by brand and design.

Identify Fitment: Ensure the crossbars are compatible with your specific GLS roof rail type (flush or raised) and the manufacturer’s locking mechanism.
Measure and Position: Place the crossbars across the roof rails at the desired spacing. Many systems have recommendations for spacing based on the type of gear you’ll carry. Ensure they are square to the rails.
Attach and Tighten: Secure the crossbars to the roof rails using the provided clamps and hardware. Most modern systems feature tool-free installation or require a simple Allen key.
Torque to Spec: Use a torque wrench if specified by the manufacturer to ensure a secure but not overtightened fit.
Test and Secure: Gently shake the crossbars to confirm they are firmly attached. Install any locking mechanisms (keys) for security.

Always check the weight capacity of your roof rails and crossbars. Mercedes-Benz typically rates its GLS roof rail system for a significant load, often around 100-165 lbs (45-75 kg), but this can vary by model year and specific configuration. Refer to your GLS owner’s manual for exact specifications. For example, the official Mercedes-Benz Owner’s Manuals will contain precise details for your vehicle.

Essential Accessories for Your GLS Roof Rails

Once your roof rails and crossbars are installed, you can outfit them with accessories to suit your needs:

Roof Boxes / Cargo Carriers

Ideal for luggage, skis, or keeping gear protected from the elements. Available in various sizes and designs.

Bike Racks

Securely transport bicycles of all types, from road bikes to mountain bikes. Options include fork-mount, frame-mount, and wheel-mount racks.

Ski and Snowboard Racks

Designed to securely hold skis and snowboards, protecting them and freeing up interior space.

Kayak / Canoe Carriers

Specialized carriers that cradle your watercraft, making transport safe and secure.

Load Stops / Headers

Used for carrying long, bulky items like lumber or ladders, these prevent items from sliding forward.

Sport/Utility Gear Carriers

This umbrella term covers a wide range of specialized carriers for items like paddleboards, surfboards, or even camping tents.

Popular Brands for GLS Roof Rail Accessories:

When purchasing accessories, look for reputable brands known for quality and compatibility with your Mercedes GLS’s rail system.

Brand	Typical Product Types	Considerations
Thule	Roof boxes, bike racks, ski racks, water sport carriers	Excellent quality, wide range of options, robust locking systems. Often a premium choice.
Yakima	Roof boxes, bike racks, ski racks, water sport carriers	Durable and versatile. Known for innovative designs and user-friendly features.
Rhino-Rack	Roof racks, baskets, specific carriers	Known for heavy-duty options and rugged performance, especially popular for off-road applications.
FABBRI	Crossbars, specific vehicle mounts	Italian brand offering high-quality, often aerodynamic solutions.
Mercedes-Benz (OEM)	Specific roof boxes, ski racks, bike carriers designed for GLS	Guaranteed perfect fit and aesthetic integration, but often the most expensive option.

Maintenance and Care for Your GLS Roof Rails

Proper maintenance ensures the longevity and safety of your roof rails and any attached accessories.

Regular Inspections: Periodically check that all bolts and mounting hardware are tight. Give the rails and any attached carriers a shake to ensure they are secure.
Clean Gently: Wash the rails with mild soap and water. Avoid abrasive cleaners or harsh chemicals that could damage the finish. Use a soft cloth or sponge.
Check Seals: Inspect rubber seals for cracks or damage. Replace them if they appear worn to maintain waterproofing.
Listen for Noise: Pay attention to any new or increased wind noise while driving. This could indicate that a rail or crossbar has loosened or is not properly aligned.
Winter Care: In areas with snow and ice, ensure any ice buildup is cleared carefully. Avoid using sharp objects that could scratch the rails.

Frequently Asked Questions (FAQ) About Mercedes GLS Roof Rails

Q1: Are Mercedes GLS roof rails difficult to install?

A1: For many GLS models, installing factory or high-quality aftermarket roof rails utilizes pre-existing mounting points. If you are comfortable with basic tools and following instructions, it can be a manageable DIY project