Suspension: Model-specific sports suspension for superior dynamism

Nov 30, 2016
Affalterbach

The agility and high cornering speed of the new E 63 4MATIC+ and E 63 S 4MATIC+ are also benefits of the completely re-engineered AMG sports suspension. It is based on the AIR BODY CONTROL fully supporting multi-chamber air suspension and affords very high camber stability. The vehicle dynamics and steering precision are also combined with a high level of comfort.

A four-link front axle design uses forged aluminium components with wishbones, strut rod and spring link. The suspension strut supports the vehicle weight via the supporting link across from the body. Independent wheel control and wheel suspension parts combined with the increased track width enable higher lateral acceleration, but minimal torque steer on the steering system.

Likewise model-specific, the entirely re-engineered rear axle was adapted specifically to the new performance saloon's increased vehicle dynamics. The multi-link concept impresses with highly precise wheel control and increased stiffness. The AMG-specific rear axle carrier makes the wider track possible, with the contact surfaces of the wheel bearings having been moved out compared with the Mercedes-Benz E-Class saloon. Other measures include AMG-specific wheel carriers, elastokinematic tuning optimised for vehicle dynamics and higher negative camber. Newly developed elastokinematics guarantee the comfort expected from the E-Class combined with high precision and vehicle dynamics.

The rear axle differential has a new mount to improve the NVH (noise, vibration, harshness) characteristics. Additional bracing measures and welds also make a contribution in this regard. As on the AMG GT R, an anti-roll bar made of tubular material reduces the weight of the rear axle. It has been adapted to the increased vehicle dynamics of the new performance saloons.

The radial brake connection has been derived from motorsport. It also helps to make the handling more agile and precise because it provides increased rigidity to counter the vibrations and forces that the suspension produces.

Due to the special rubber bushes on the axles and the new elastokinematics, it was possible to improve camber stability by 30 percent compared to the previous AMG model.

Personalised driving experience thanks to three-chamber air suspension system

The air suspension system with three chambers, a sporty spring damper set-up and continuously adjustable damping also takes the ability to individually tailor the driving experience to a new level. It combines exemplary vehicle dynamics with good road roar and tyre vibration characteristics. The rigidity of the air springs can be fine-tuned by activating or deactivating individual air chambers. This results in a tangible increase in comfort, as well as having a positive effect on handling.

By carrying out extended series of trials and test drives, the developers at AMG have defined three spring tuning settings depending on the selected drive program and the actual driving conditions. During sudden load changes, fast cornering, heavy acceleration or hard braking, the spring rate is also automatically made harder on the front or rear axle. This reduces roll and pitching effectively and stabilises the performance saloons.

In the "Comfort" program the suspension is heavily oriented towards providing a comfortable ride. Irregularities in the road surface are absorbed and the four-door model travels smoothly. In "Sport" mode, the E 63 4MATIC+ and E 63 S 4MATIC+ handle significantly more dynamically with reduced roll thanks to a harder spring rate. "Sport Plus" mode delivers further enhanced agility and cornering ability because the front and rear axles have an even more rigid suspension.

What is more, the driver can set the adaptive damping in three stages – Comfort, Sport and Sport Plus – to choose between relaxed comfort on long journeys and maximum sportiness. The rebound and compression levels are adjusted independently of each other and the freely programmable characteristics map permits a wide spread between the minimum and maximum damper force. The difference between the comfortable and sporty suspension setting is thus more refined and is subjectively even more perceptible – depending on the particular driving situation.

The complete package is compelling: The E 63 4MATIC+ and E 63 S 4MATIC+ combine steering precision and the highest level of longitudinal and lateral dynamics with maximum traction, while at the same time boosting ride comfort.

Rear differential lock: optimal traction, including on the racetrack

To improve traction and vehicle dynamics the E 63 4MATIC+ has a mechanical rear differential lock and the E 63 S 4MATIC+ has an electronically controlled rear differential lock. Both differentials reduce the slip on the inside wheel when cornering, without control interventions in the braking system. This ensures that the driver is able to accelerate out of corners earlier and with more power thanks to the improved traction. The car remains more stable when braking from high speeds, and the limited-slip differential also improves traction when moving off. The greatest benefit of the electronic rear-axle limited-slip differential is the even more sensitive and proactive control, which pushes the thresholds higher and makes it even easier to drive at the vehicle's limits. To deliver optimum cooling, the housing of the limited-slip differential has additional cooling fins.

The three-stage ESP® with "ESP ON", "ESP SPORT Handling Mode" and "ESP OFF" settings works in perfect unison with the rear-axle limited-slip differential and AMG 4MATIC+ all-wheel drive system, and is optimally tuned to the outstanding dynamics.

Direct and with clear feedback: AMG Sport speed-sensitive steering

The electromechanical speed-sensitive sports steering features a variable ratio on the E 63 4MATIC+ and the E 63 S 4MATIC+. It stands out thanks to the AMG-specific rack-and-pinion ratio with its precise, highly authentic feedback. Steering power assistance is variably adjusted in the stages "Comfort", "Sport" or "Sport Plus". The relevant characteristics are automatically activated depending on the selected DYNAMIC SELECT drive program or can be personalised in "Individual" mode. At low speeds the driver only needs to provide minimal steering input. At high speed he or she is able to rely on solid straight-line stability. The clearly defined centre bearing and authentic feedback likewise contribute to the optimum steering feel.

Good sensitivity and fade-resistant: the AMG high-performance braking system

The large-sized high-performance braking system decelerates the performance saloon reliably and quickly and is fade-resistant even under high loads. The E 63 4MATIC+ has internally vented and perforated compound brake discs in size 360 x 36 mm at the front with six-piston fixed calipers and in size 360 x 24 mm with single-piston floating brake calipers on the rear axle. The E 63 S 4MATIC+ is fitted with even larger compound brake discs on the front axle in size 390 x 36 mm. For the more powerful variant, the AMG Carbon Ceramic braking system is available as an option with brake discs in size 402 x 39 mm on the front axle and 360 x 32 mm on the rear axle.

More safety and driving enjoyment: three-stage ESP®

The three-stage ESP® allows significantly higher vehicle dynamics and driving enjoyment in ESP® Sport Handling Mode and with the ESP® OFF setting. The specific traction logic is active at all times: When a driven wheel starts to lose traction, ESP® applies the brakes in a targeted way for optimum transfer of the engine output to the road.

In this way, the three-stage ESP® provides additional safety or more fun at the wheel to suit requirements.

  • ESP® ON: for a high level of safety by adapting to the sporty character of the car
  • ESP® Sport Handling Mode: allows wider yaw angles before system intervention for a sporty driving style
  • ESP® OFF: system deactivated for a sporty driving style on closed circuits. During hard braking ESP® is switched back on temporarily.
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