There are a lot of cool cars we can't have in the United States, including a host of incredibly fast yet still practical wagons. The Mercedes-Benz CLS63 AMG Shooting Brake is the first that pops into mind, but the RS6 Avant is the vehicle that adds even more insult to injury. While Europe gets no less than four Audi-badged wagons, U.S. customers have just the one in the form of the A6 Allroad. And while most of us can live without the A4 Avant and the A3 Sportback, not having the RS6 Avant on this side of the pond is pure blasphemy. While I could rant about this for hours, I'm going to take a break to tell you about the latest Exclusive package Audi rolled out for the RS6 Avant.

The bundle comes just in time for the wagon's recently launched facelift and adds further aggressiveness to the already beefed-up grocery getter. Nothing massive, but just enough to turn the RS6 Avant from enticing to downright sinister.

Click past the jump to read more about the Audi RS6 Avant by Audi Exclusive.

Exterior

As with most Audi Exclusive models, this RS6 boasts subtle exterior modifications. The main highlight of the wagon is its matte-gray paint job, which gives it a rather menacing appearance in conjunction with the aggressive body features that come with any RS badge.

Of course, add-ons aren't limited to a custom color. The front end sports a carbon-fiber splitter and lower grille inserts, while the rear is now adorned by a carbon-fiber diffuser. Likewise, the side-mirror caps are also made from the lightweight material, enhancing the car's sinister look. Rounding of this RS6's exterior is a set of black, alloy wheels finished in a twin-five-spoke design and wrapped in the usual low-profile, performance tires.

Interior

The dark theme Audi Exclusive wrapped this wagon in continues in the cabin, where every inch of leather and Alcantara is painted black. Subtle threads of yellow stitching on the seats, steering wheel, door armrests, center console and lower dashboard area are the only bits of color that manage to pierce the darkness of this cockpit.

Carbon-fiber trim replaces every bit of aluminum and wood, leaving very few chrome parts to shine through. Needless to say, this interior is a great place to be if your name is Darth Vader.

Drivetrain

The subtle yet effective changes applied inside and out are totally missing under the hood, as Audi Exclusive left the drivetrain untouched. But that's not something customers will complain about, as the RS6's turbocharged, 4.0-liter V-8 packs a serious punch to the tune of 560 horsepower and 517 pound-feet of torque. Using an eight-speed, tiptronic automatic and quattro all-wheel drive to grip the tarmac beneath the wheels, the drivetrain combines to deliver staggering performance figures.

While it might seem large and heavy, the wagon needs only 3.9 seconds to blast to 60 mph toward a top speed of 190 mph. Talk about getting your groceries in a jiffy!

Prices

As usual, Audi is mum on the premium these updates add to the standard RS6 Avant, but we're looking at more than $10,000 worth of extra goodies. Unfortunately for those of you living in the United States, you can't have any of them simply because Audi doesn't sell this wagon in North America. But if you happen to live in the UK, you can grab one for at least £77,995 ($121,400 as of 12/30/2014).

Competition

Mercedes-Benz E63 AMG Estate

Since BMW doesn't build a wagon version of the M5, the Mercedes-Benz E63 AMG is the RS6 Avant's sole competitor to come from Germany. Although the latter isn't sold here in the States, the two wagons can clash just about anywhere in Europe in arguably the most practical head-to-head comparison of the modern, high-performance era.

While the Merc is not as fresh as the RS6 Avant, which received a facelift for 2015, that's not to say the AMG's beefed-up wagon is dated. Its exterior design still feels modern, while the interior combines the highest-quality materials, the sportiness and the workmanship AMG is known for. The real treat is under the hood, where a 5.5-liter V-8 roars to the tune of 550 horsepower and 531 pound-feet of torque. 0-to-60 arrives in just 3.7 seconds, making it quicker than the RS6 Avant. On the other hand, top speed is limited at 155 mph.

Shoppers in need of more power can opt for the S package, which increases output to 585 ponies and 590 pound-feet of torque. U.S. pricing for the E63 AMG S 4MATIC begins at $103,200. In the UK, the souped up estate retails from £74,375, around £3,500 cheaper compared to the RS6 Avant.

Jaguar XFR-S Sportbrake

The XFR-S Sportbrake is one of the very few high-performance wagons you can buy nowadays, but much like the RS6 Avant, you can't have it in the United States. This leaves the British estate to battle it out with the Audi in mainland Europe and the United Kingdom, where the XFR-S gets to unleash its supercharged, 5.0-liter, V-8 engine at full blast. The mill churns 543 horsepower and 502 pound-feet of torque, pushing the Jag from 0 to 60 mph in 4.6 seconds and up to a top speed of 186 mph.

Granted, the XFR-S is slower than both its German rivals, but its exhaust note is no match for the turbocharged units found in the E63 AMG and the RS6. Less popular as far as sales and availability go, the XFR-S Sportbrake is the more expensive wagon of the pack, retailing from £82,495 ($128,400 as of 12/30/2014) on British soil.

Conclusion

Ever since Audi Exclusive brought the RS7 Dynamic Edition at the 2014 New York Auto Show, I've learned that these bespoke vehicles are among the most ridiculous luxury cars you can buy. And by ridiculous I'm mean awfully expensive, as the Dynamic Edition costs an extra $40,000 when compared to the standard RS7 and $10,000 more than a fully loaded car. Sure, that might not be the case with this RS6 Avant, but the wagon is likely to fetch a small fortune for the added carbon-fiber bits.

Granted, the RS6 Avant is arguably one of the coolest wagons around, and I wish Audi would bring it to the United States sooner than later, but my advice is to stay away from the Exclusive package unless you're sitting on a very fat wallet and your garage is already packed with the world's most coveted automobiles.