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The CLS 63 AMG S with RaceChip Ultimate - Luxury Performance with 1,057Nm

News & Stories | 29.05.2015 | RaceChip
The Mercedes CLS 63 AMG S may look like an elegant business car but it is really a well-trained sports limousine of the highest class. When the V8 BiTurbo comes to life, everybody turns into a car enthusiast. Its 585hp and 800Nm speak for themselves. But what happens when, let’s say, the most powerful limousine of the modern era, the Dodge Charger SRT Hellcat, with its 881Nm torque, shows up behind us on the left lane? This posed an interesting challenge for the engineers of our Swabian development department: the perfection of an excellent product to awaken the still dormant capacity reserves of this vehicle. The result: Plug & Drive and plenty of excitement! At the end of our development work, the RaceChip Ultimate pushed the Mercedes further, by almost 100hp and 250Nm. Indeed, the car was put back on the road with 682hp and a maximum torque of 1,057Nm. We suddenly had a need for speed and a thirst for adrenaline!
By the way: in the wake of the near-legendary 6.2l, naturally-aspirated engine, Mercedes AMG will now phase out the CLS 5.5l BiTurbo, albeit gradually. Just as with the new AMG GT(S), C63 AMG and GLC 63 AMG (from 2015) models, it is almost certain that the next generation of CLS-Class will come with the 4.0l BiTurbo engine.

From Production Line to Customization

An old proverb states that “the perfect is the enemy of the good”. This is exactly what these German premium manufacturers had in mind when they suddenly began, many years ago, to give the series models RS-line, M and AMG fuel-injection performance enhancements. Here, brave Sedans are transformed into brute horsepower monsters. But, of course, there are certainly other methods of achieving engine optimization.

That’s why we chose the elegant CLS top model made in Alfaterbach: the Mercedes CLS 63 AMG S. The optics, finishing and equipment are worthy of special mention, without a doubt. But the real highlight is under the hood. A modern V8 BiTurbo, with 5.5 liters of cubic capacity, handmade and high quality and centered around the AMG philosophy of "one man - one engine". We feel the excitement as we start it up. The seductive sound of the four-pipe exhaust system hints at tremendous acceleration: 0 to 100 km/h in 3.6 seconds. This is made possible by the vehicle’s 585hp, with a maximum torque of 800Nm. This is all fired up on the asphalt by a powerful all-wheel drive system with limited slip differential.

Torque? Four Digits.

The car is, to put it briefly, a feast for all the senses. There is really nothing left to improve. Or is there? Well, when adopting a particularly enthusiastic driving style, the unladen weight of the nearly two-ton vehicle becomes apparent. And if your wallet allows you to spend over 100,000 euros (or in this case: 131,495 euros, base price) there is still unfortunately some luxury competition out there for this vehicle. Not only the Dodge Charger Hellcat, for example, but also the Audi RS7 Sportback, or the BMW M6 Gran Coupé, with their 560hp. Nevertheless, to set the record straight, we have donated the CLS one of our RaceChip Ultimates.

This takes us back to our theory of “the perfect is the enemy of the good”. We put the CLS 63 AMG S to the test and, as expected, it delivered over 585hp and thus 28hp more than a vehicle without the “S” in the name. But our initial tests already showed that the 5.5l V8 engine still had extensive power reserves, leaving room for further improvements. So we set ourselves an elaborate task: to optimize our software to gradually perfect the engine of the AMG. The result was a customized RaceChip Ultimate, which helps the car achieve sublime and unique performance levels for its class. Indeed, our final performance test fulfilled our expectations: the Mercedes, thanks to the RaceChip Ultimate, boasted over 682hp, with a maximum torque of 1,057Nm. The car has thus finally arrived in the premier league of the automotive classes. We will no longer be hitting the road in Ingolstadt or Munich, but rather in Maranello or Sant'Agata Bolognese! After the very first red light, the acceleration is already pushing us back into our seat, while also putting a big smile on our faces. But the AMG can still do much more with a RaceChip Ultimate. Due to the extremely high torque, short bursts of speed and accelerating out of corners are a pure pleasure. You will suddenly forget the weighty struggle with the CLS. And even though you can speed up to 300km/h with the AMG Driver's Package, the RaceChip now pushes the car even further to its limits.

Conclusion & performance chart

Original performance chart

We are proud to say that our 100% “Made In Germany” RaceChip acts as the perfect complement to this masterpiece of German engineering.

Measured factory output: 430kW (585hp) 800Nm

Just a few minutes after installing our Plug&Drive solution, the Swabian boost of an additional 97hp and 257Nm kicked in.

Performance after optimization: 502kW (682hp) 1057Nm

There are small cars that would be satisfied with just the added power this engine gained! And bear mind: this boost came solely from the natural power reserves of the engine. This improvement costs only 949 euros - not even 10 euros per unit of additional horsepower. This is chip tuning of the highest level – and engine* and product warranties are of course included!

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