2011 - 2015 Mercedes Benz CLS400 CLS500 CLS63 AMG W218 RT Style Rear Diffuser

Enhance the rear profile of your Mercedes-Benz CLS with this RT Style carbon fiber rear diffuser. Designed for the W218 chassis, this exterior upgrade adds a sharper and more aggressive appearance while complementing the vehicle’s flowing factory body lines.

The sculpted RT Style design creates greater visual definition across the lower rear fascia and gives the CLS a more purposeful, performance-inspired presence. Its pronounced contours enhance aerodynamic styling and pair naturally with compatible trunk spoilers, side skirts, front lips, and other exterior upgrades.

Available in CFRP and FGCF material options, this rear diffuser combines lightweight construction with premium carbon fiber styling. Designed for compatible 2011-2015 Mercedes-Benz CLS400, CLS500, and CLS63 AMG W218 models, each package includes one RT Style rear diffuser.

Product Specifications

Key Features

• RT Style rear diffuser designed for compatible Mercedes-Benz CLS models
• Compatible with listed W218 chassis applications
• Adds a sharper and more aggressive lower rear profile
• Creates greater visual definition across the rear fascia
• Sculpted contours provide a performance-inspired appearance
• Available in CFRP and FGCF material options
• Lightweight carbon fiber construction with a premium exterior finish
• Designed to complement compatible trunk spoilers, side skirts, and front aero components
• Suitable for refined street, show, and performance-inspired exterior builds
• Includes one RT Style rear diffuser

Configuration Options

• CFRP: Carbon fiber reinforced polymer construction with a traditional woven carbon fiber appearance
• FGCF: Forged carbon fiber construction with a distinctive randomized carbon pattern

Package Includes

• One RT Style rear diffuser

Note: Exhaust trim, heat shielding, reflectors, brackets, clips, screws, adhesive, and additional mounting hardware may not be included unless otherwise specified.

Installation

• Designed for installation along the compatible lower factory rear bumper
• Professional installation is recommended for accurate alignment and secure mounting
• Test fit the diffuser before drilling, trimming, applying adhesive, or completing final installation
• Clean and degrease all mounting surfaces thoroughly before installation
• Use suitable automotive screws, clips, brackets, or adhesive as required
• Additional mounting hardware or supporting brackets may be necessary
• Minor drilling, trimming, sanding, or alignment adjustment may be required
• Confirm adequate clearance around the exhaust outlets and surrounding bumper components
• Verify secure attachment and sufficient ground clearance before driving

Fitment

• 2011-2015 Mercedes-Benz CLS400 W218
• 2011-2015 Mercedes-Benz CLS500 W218
• 2011-2015 Mercedes-Benz CLS63 AMG W218

United States: Free shipping available to the lower 48 states across all items. Other states will incur a shipping charge.

Worldwide: Free shipping is available for Complete Headlights, Taillights, DRLs. For custom headlight retrofits, carbon fiber products, and performance products, there will be a shipping charge.  

Please note:
• For Retrofits, you are purchasing a headlight modification service.
• If you select "Shipping own headlights to BayOptiks for modification", you are required to send us your headlights.
• If you choose "Purchase new OEM headlights", we will order and modify a new OEM headlight for you.
• Once your customizations are complete, we will ship it to you!

• Complete Headlights: 3-5 business days for order processing plus shipping time.
• Custom & Pre-Built Headlights: 6-8 weeks depending on the complexity and component availability.
• New OEM and cores: 6-8 weeks plus an additional 4-8 weeks as these are special orders base on the vehicle VIN due to different versions (North American, European, etc.)
• DRLs, Taillights, Brake Pads, and Carbon Fiber Aero: 3-5 business days for order processing, plus shipping time.
• Lens Replacements: 1-3 weeks plus shipping time.

Please note, we do not have control over the time frames of our vendors, manufacturers, and delivery services as they may delay processes in regards to components and shipment.