The Mercedes-Benz G-Class W465, particularly from the 2018 model year onward, comes with a high-performance exhaust system that complements the vehicle's powertrains and offers a balance between performance, sound, and efficiency. Below is a detailed breakdown of the exhaust system in the W465 G-Class, focusing on different models, including the performance-focused AMG G 63.

1. Exhaust System Overview:

• The exhaust system in the G-Class is designed to handle the high-performance engines in various trims while ensuring the vehicle meets stringent emissions regulations. The system is engineered to provide optimal sound and performance while maintaining efficiency, particularly for the AMG models and the diesel variants.
• The exhaust system consists of several components, including exhaust manifolds, catalytic converters, mufflers, and tailpipes, with varying configurations depending on the specific model.

2. G-Class W465 Exhaust System by Model:

G 500 and G 350 d / G 400 d:

• Engine: These models come with a 4.0-liter V8 biturbo (G 500) or 3.0-liter inline-6 turbocharged diesel (G 350 d / G 400 d).
• Exhaust System:
  • These versions feature a more conventional dual exhaust system. The exhaust setup ensures efficient engine output while keeping emissions in check.
  • The diesel models (G 350 d, G 400 d) are equipped with selective catalytic reduction (SCR) and diesel particulate filters (DPF) to comply with global emissions standards. The system provides a smoother sound profile but focuses more on fuel efficiency and lower emissions.
  • Sound: While quieter than the AMG variants, these engines still provide a deep, satisfying tone, particularly with the turbocharged V8 in the G 500. The G 350 d and G 400 d diesel engines focus more on refined sound to enhance long-distance driving comfort.

AMG G 63:

• Engine: 4.0-liter V8 biturbo with AMG performance tuning.
• Exhaust System:
  • The AMG G 63 is equipped with a performance-oriented exhaust system, designed not only for performance but also for a distinctive exhaust note that reflects its high-performance pedigree.
  • The AMG exhaust features a dual exhaust layout with valve-controlled mufflers. This allows for a more dynamic and aggressive sound, which can be adjusted based on the selected driving mode. When the vehicle is in Sport or Sport+ mode, the exhaust valves open, producing a louder, more aggressive exhaust note.
  • Active Exhaust Valves: These valves adjust the flow of exhaust gases depending on the engine load, driving mode, and throttle input, giving the AMG G 63 a powerful and exhilarating exhaust sound at high RPMs. This sound is a characteristic feature of AMG models, providing a growling sound at full acceleration and a more refined tone at cruising speeds.
  • The exhaust tips on the AMG G 63 are typically larger and more pronounced, offering an added aesthetic that reflects its performance capabilities.
  • Sound: The AMG V8 engine is known for its distinctive throaty and racy exhaust note, offering one of the most engaging sounds in the performance SUV segment. This sound is further emphasized by the valve exhaust system, which enhances the driving experience.

3. Exhaust Performance and Features:

Exhaust Sound Tuning:

• Mercedes-Benz engineers have designed the AMG G 63 exhaust to be not only functional but also an integral part of the driving experience. The active exhaust system allows the driver to experience a more intense and throaty sound when accelerating hard or driving aggressively. When the vehicle is driven in more comfort-focused modes (such as Comfort or Eco), the exhaust valves close, resulting in a more refined and quieter cabin experience.
• For the G 500 and diesel variants, the exhaust sound is more subdued but still provides a deep and authoritative growl, especially under load or during hard acceleration. The diesel engines in particular offer a slightly different sound profile, with a more muted and reserved tone due to their turbocharged nature.

Exhaust Emissions and Efficiency:

• The G-Class W465 complies with modern emissions regulations across the globe. This includes the use of catalytic converters, diesel particulate filters (for the diesel models), and selective catalytic reduction (SCR) in diesel engines to minimize harmful emissions.
• The exhaust system ensures that the G-Class meets environmental standards while maintaining high levels of engine performance, particularly in the AMG and turbocharged variants.

Exhaust Sound Customization:

• With the AMG Dynamic Select system, drivers can alter the vehicle’s behavior, including the exhaust sound, by choosing from various driving modes:
  • Comfort Mode: In this mode, the exhaust system focuses on providing a more refined sound profile, optimizing comfort for long highway drives.
  • Sport and Sport+ Modes: The exhaust valves open wider in these modes, offering a more pronounced and louder sound to enhance the driving experience during more aggressive driving.
  • Manual Mode: When drivers opt for manual control over gear selection, the exhaust system responds accordingly to reflect the performance-oriented nature of the manual shift experience.

4. Additional Features in the Exhaust System:

• Exhaust Heat Shields: These are included to protect the vehicle’s underbody from heat buildup, particularly during off-road driving or during high-load conditions.
• Downpipes and Turbochargers: The turbocharged engines in both the G 500 and AMG G 63 have specialized downpipes designed to ensure optimal turbo performance while maintaining exhaust flow. These components reduce turbo lag and increase responsiveness.
• Tailpipe Design: In the AMG G 63, the tailpipes are larger, typically quad-exit, and are designed for maximum visual and auditory impact. The AMG styling enhances the bold and aggressive aesthetic of the G-Class.

Conclusion:

The Mercedes-Benz G-Class W465 features a sophisticated exhaust system designed to meet both performance and environmental standards. The AMG G 63 exhaust system stands out for its active exhaust valves, offering the ability to control the sound and enhance the driving experience with a thrilling engine note. Meanwhile, the G 500 and diesel variants provide more refined, deeper tones suitable for both on-road and off-road driving. Regardless of the model, the exhaust system in the G-Class enhances the overall driving experience by providing the right sound, efficiency, and performance across a variety of driving conditions.