63 AMG-style rear diffuser for Mercedes CLS C257 — the rear end of an AMG on your four-door coupé
This Mercedes CLS rear diffuser in a gloss black finish is designed to replicate the look of the 63 AMG versions on the CLS C257 (2018–2022). Made from reinforced ABS, it enhances the vehicle's visual appeal by incorporating cutouts for 63-style exhaust tips and aerodynamic lines that complement the original bumper. At first glance, the CLS's rear end gains the low, wide stance that sets true AMGs apart from Line trims — without altering the mechanical components or exhaust system.
A design that transforms the rear of your CLS
The gloss black finish serves a specific purpose here: it creates a distinct shadow beneath the bumper, visually widens the rear track, and highlights the exhaust tips. On a light-colored body, the contrast is striking; on obsidian black, the diffuser blade catches glancing light and accentuates its design. It is one of the few exterior accessories that genuinely changes the vehicle's perceived silhouette.
The vertical fins echo the styling language of AMG models from the same period. Paired with a rear bumper blade and matching tips, the entire assembly creates a cohesive rear end, far removed from the mismatched look of universal kits.
Material, finish and kit contents
Reinforced thermoplastic ABS is the standard material for this application: flexible enough to withstand minor curb contact, rigid enough to resist vibration at motorway speeds, and, above all, resistant to road debris and UV rays. The diffuser comes with exhaust tips, a mounting kit, screws and rivets to facilitate installation in a workshop or by a knowledgeable DIYer.
- 63 AMG look — cutouts for 63-style exhaust tips and vertical fins faithful to the AMG style.
- Reinforced thermoplastic ABS — resistant to road debris, UV rays and temperature fluctuations.
- Gloss black finish — plastic paint finish, with chrome or black tips available depending on the variant.
- Complete mounting kit — diffuser, 2 exhaust tips, screws and rivets included.
- No mechanical modifications — the original exhaust system remains completely intact.
Compatibility, installation and vehicle adaptation
Compatible with CLS C257 models equipped with the AMG Line package according to the manufacturer's specifications; installation requires drilling a few holes in the bumper and prior fitting (a dry fit is recommended). Designed for aesthetic purposes and exterior customization, it is suitable for owners who want an "AMG look" without mechanical modifications. It is installed on the original bodywork; check compatibility with your VIN or contact customer service before installation if in doubt. Installing a rear diffuser is always best done in a workshop, with the bumper removed and placed on stands to mark the drilling points with millimeter precision.
What is a rear diffuser really used for?
On a production car, its primary function is visual: it optically lowers the rear end and structures an area that is often left smooth and plain in the original design. Technically, the vertical fins channel the airflow exiting from beneath the vehicle and reduce turbulence immediately behind it — a real effect, but one that is only noticeable at sustained speeds. In everyday driving, it is the aesthetic transformation that justifies the investment: a 63 AMG-style diffuser changes the perception of a CLS more than most accessories in the same price range.
Why order your Mercedes CLS rear diffuser from Becquet Voiture?
Becquet Voiture selects its bodywork parts based on their actual fitment quality, not on a flattering 3D rendering. Our catalog covers the main German premium sedans and coupés, with the same level of exacting standards for diffusers, blades and bumper blades. Our French-speaking advisors will help you confirm your AMG Line trim before ordering and prepare you for your workshop appointment. To complete the look, discover our badges and grilles, our aerodynamic elements and our best-selling performance accessories.
Order your 63 AMG-style rear diffuser for the Mercedes CLS C257 now and plan the transformation of your rear end this week.
Material: Reinforced thermoplastic ABS (resistant to road debris and UV rays)
Finish: Gloss black (plastic paint finish) — chrome or black tips available
Dimensions (product): Length ≈ 150 cm × Width ≈ 35 cm × Height ≈ 25 cm (standard product values)
Weight (packaged): ≈ 7.0 kg (estimated shipping weight in protective packaging)
Installation: Drilling a few holes in the bumper required; dry fit recommended; workshop installation advised
Vehicle compatibility: Mercedes CLS C257 (2018–2022) — AMG Line models / mandatory check before installation
Kit contents: 1 rear diffuser, 2 exhaust tips, mounting kit, screws and rivets
Technical notes: Does not modify the mechanical components or the original exhaust system; maintain a proper seal and secure mounting during installation
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