2021 Mercedes-AMG GLE 63 SUV

One key difference separates the GLE63 and the larger GLS 63 we tested earlier this year: Race mode. The GLS 63 only goes up to Sport Plus Mode, but the GLE63 adds Race Mode, a subtle difference that you wouldn't expect to create a massive change. But it does. Race Mode transforms the GLE from luxury insulation pod to an attack animal with the turn of a dial. The GLE's drive modes have the ability to alter various aspects of the driving experience, including the steering, traction control, throttle mapping, suspension stiffness, ride height, exhaust note, and more. All of these settings can also be adjusted independently of each other, should you want loud exhaust (as an example) without the harsh ride of Race Mode.

Most notably, the GLE63's steering feels far more precise than the GLS 63, and even more pinpoint than the BMW X5 M. In Comfort and Sport Mode, the steering feels light and lax, allowing the car to be driven comfortably and without fuss. But in Sport Plus and Race Mode, it gains noticeable heft and sharpens up with the precise accuracy of an AMG GT sports car. Steering this sharp is rarely found in an SUV, let alone one of this size. The GLE63 responds to the tiniest inputs from the steering wheel, providing unmated levels of feedback to the driver. Combined with AWD and endless amounts of power, drivers might be mistaken for thinking their 5,000-pound-plus SUV is actually a supercar. It's not.

The standard GLE is one of the most comfortable SUVs this side of a Cullinan, but AMG has stiffened the suspension considerably. It isn't an intolerable ride, but buyers looking to iron out all road imperfections should opt for a non-AMG GLE with the E-Active Body Roll suspension. Massive six-piston front brakes help drive the car to a stop and carbon ceramics are available optionally should you really feel like stopping in a hurry. On long, open roads, the GLE63 can carry tremendous speeds through the corners while keeping body roll to a surprising minimum. It is only around really tight bends you are reminded that this is not a mid-engined supercar. It's still a tall, heavy SUV, and at a certain point, AMG's best engineers can not triumph completely over the laws of physics. You can reach a point of understeer should you take a corner at absurd speeds, but we feel most owners will rarely approach this limit.

Should you have the funds to purchase one, the 2021 Mercedes-AMG GLE63 S is a near-flawless performance SUV. It looks more aggressive than a standard GLE, still has the same awe-inspiring interior and technology, but can now keep up with sports cars in a straight line. There are some handling compromises of the tall ride height and tremendous weight, though most owners will likely never reach these limitations unless they want to risk a hefty speeding ticket. AMG has certainly taken away the road-isolating comfort of the standard GLE, but as a trade-off for the heart-pounding performance, the GLE63 rides reasonably well and doesn't jostle its passengers too much. Massaging seats, a near-silent cabin, and a powerful Burmester audio system drown out most of the road noise and imperfections associated with the AMG add-ons.

The GLE63 is not without competition from the Audi RS Q8, BMW X5 M, and Porsche Cayenne Turbo. While we have not road tested the RS Q8 or Cayenne Turbo yet, we can unequivocally say that the AMG feels more dynamic than the M car. The GLE63 is louder, sharper, and more responsive than the X5 M, and it features a nicer interior with more passenger space. AMG has come a long way from being focused on top speed, straight-line acceleration, and burnouts, to now offering the driver's feedback once associated with BMW's M Division. If it were our six-figure bonus to toss down on a high-performance SUV, the GLE63 feels like a top option.

While mechanically identical to the BMW X5 M, the X6 M offers just as much performance but in a more flamboyantly styled package. In X6 M Competition form, the BMW produces 617 horsepower and 553 lb-ft of torque, so it's more powerful but less torquey than the GLE63 S. Both SUVs have identical 0-60 times of 3.7 seconds and almost the same top speed, so there is nothing in it. They're even exactly the same length, although the sloping roof of the X6 M reduces cargo capacity compared to the Merc. On the road, both are a riot to drive, but the BMW does feel a touch more dynamically involving than the GLE63, which, like many older AMGs, is dominated by its engine. The X6 M is a bit better-equipped, too, with standard features like four-zone climate control and a heated steering wheel, which are optional on the GLE. The Mercedes is the more practical choice, and it isn't as divisive to look at, but the X6 M does stand out more.

The segment's dynamic benchmark, the Porsche Cayenne Turbo, is better than ever. With 541 hp from its 4.0-liter twin-turbo V8, the Cayenne Turbo is down on power compared with the GLE63 S. However, it makes the most of what it's got, and with the Sport Chrono Package, it'll blitz the 0-60 run in 3.7 seconds, exactly the same time as the Mercedes. While the GLE impresses in isolation, the Cayenne demonstrates what's possible in a high-performance SUV when you reach the first corner. It responds with immediacy but isn't twitchy, and there's more of a connection between the road and the driver than in the AMG. When you aren't pretending you're in a 911 and it comes down to day-to-day family duties, the Mercedes gains the edge with its superior ability to seat five occupants and a larger cargo area. The GLE is also better-equipped. As these are performance SUVs, the driving experience holds more weight, so that's why we'd side with the Cayenne Turbo.