Mercedes-AMG GLS63 is refined beast, with 5.5 liter twin turbo V-8 is able to produce 577 horsepower and torque of 561 lb-ft at 1750 rpm, GLS63 retains faimiliar AMG seven speed automatic calibrated for all wheel drive. 2013 it quoted 4.8 seconds company is quotting 4.3 seconds to reach at 60 mph with this version but we doubt and it can be a little quicker by single odd seconds.
GLS63 is occupied with recalibrated air-sprung Airmatic suspension. Sport+ modes optimize transmission and alters damping characteristics. 21 inch Continental tires provides better road grip. Suspension mitigates road impacts, indirectly providing cabin comfort.
GLS63 interior uses high grade black plastics and nappa leather , with dark poplar wood trim, along with round instruments, European styled stack controls in center, large console. Integration of navigation screen got highly improved with this version. Cargo can increase to 49 cubic feet from 16 cubic feet by flat folding third row seat and can towe uptil 7500 pounds like other GLS models.
You need to double price for what you pay for GLS350d which is $68K, i.e. for $125,000 you get GLS63 which is far too high, remember GLS350d has better power and fuel economy.