Despite the more aggressive tuning from AMG there is still plenty of power and torque left on the table. There are torque limits built into the ECU by AMG in order to protect the 4Matic drivetrain that have stumped tuners but AMS seems to have found their way around these limits. The result is an increase in horsepower to 700 at the crank and 830 pound-feet of torque for the E63 AMG S and standard E63.
Both cars hit the same tuned figures as they should showing the differences in the models are artificially limited by software. The only reason to get the AMG S is if one is interested in preserving their warranty and not tuning the car. If you're reading this site that is not you so buy the standard E63 AMG and pocket the change.
The difference in horsepower between the 2014 E63 AMG 4Matic and E63 AMG S 4Matic is 21 horsepower. Not much, right? Well, the torque figure is where the difference really lies as the S has an additional whopping 89 lb-ft of torque. There is a big difference in the mapping of both cars so Mercedes is not lying about the advantage of the S model.
Pricing is $2995.95 and certainly worth every penny. AMS product page: http://tuning.alphaperformance.com/p...matic-biturbo/
Contact @ALPHA Performance with any questions.
Dyno charts below. BenzBoost hopes AMS can show us charts with output at the wheels in addition to these crank numbers: