Mercedes-Benz is preparing a significant update for its iconic SL roadster. While recent sightings of camouflaged prototypes suggest a subtle aesthetic refresh, the real transformation lies beneath the surface. The upcoming facelift marks a pivotal moment for the model, as Mercedes moves to resolve long-standing criticisms regarding its entry-level performance and prepares for stricter global emissions regulations.
Refined Aesthetics and Enhanced Tech
Visually, the facelift appears to follow Mercedes’ recent design language trends rather than reinventing the wheel. The silhouette and proportions of the two-door roadster will remain intact, but the “face” of the car is set for a makeover.
- New Lighting Signature: Expect redesigned headlights featuring a star-pattern LED signature, moving away from the current sharp, triangular shapes toward a smoother, more rounded aesthetic.
- Updated Front Fascia: New renderings suggest a redesigned grille with vertical slats and matte black trim that integrates seamlessly with the new LED units.
- Next-Gen Software: The interior will receive a major digital upgrade with the introduction of the Mercedes-Benz Operating System (MB.OS). This unified platform will manage infotainment, driver assistance, and vehicle functions, supporting seamless over-the-air updates to keep the car current throughout its lifecycle.
The End of the Four-Cylinder Era
For years, the SL’s base four-cylinder engine has been a point of contention for enthusiasts who felt it lacked the prestige and smoothness expected of a high-end roadster. The upcoming facelift addresses this directly, driven largely by the necessity to meet Euro 7 emissions standards.
The current 2.0-liter turbocharged four-cylinder (M139) will be retired. In its place, Mercedes is introducing a much more robust 3.0-liter inline-six (M256evo). This shift is a significant upgrade for several reasons:
1. Increased Performance: The new inline-six is expected to produce 449 hp, supplemented by an integrated starter generator that adds an additional 23 hp.
2. Improved Dynamics: To handle the increased power and provide better grip, the base model will likely transition from rear-wheel drive to all-wheel drive (4Matic+).
3. Better Refinement: An inline-six offers inherently smoother power delivery and better balance than a high-strung four-cylinder, aligning better with the SL’s luxury positioning.
Upgrades for the AMG Powerhouses
The high-performance AMG variants are also receiving technical refinements. The V8 engines will adopt a new 4.0-liter twin-turbo setup featuring a flat-plane crank—a configuration previously seen in the S-Class.
While purists may note that a flat-plane crank produces a different, higher-pitched sound compared to the traditional guttural roar of a cross-plane V8, the trade-off is a more responsive engine that meets modern environmental mandates without sacrificing potency.
* SL 55 AMG: Projected to deliver 537 hp (plus 23 hp from the electric starter generator).
* SL 63 AMG: Expected to reach a formidable 650 hp.
Looking Ahead
The timeline for this refresh suggests a debut as early as late this year, with the updated models hitting showrooms in 2027.
By replacing the controversial four-cylinder with a more powerful inline-six and updating its V8 architecture, Mercedes is prioritizing a balance of high-end performance and regulatory compliance.
Conclusion
The Mercedes-Benz SL facelift is less about a visual revolution and more about mechanical evolution. By upgrading its base engine and refining its V8 powerplants, Mercedes is positioning the SL to remain a competitive, premium roadster in an era of increasingly strict emissions laws.
