The GL350 can tow up to 7,500 lbs. Also standard are 19-inch alloy wheels, LED running lamps, automatic headlights and wipers, power liftgate, privacy glass, power sunroof, adjustable air suspension, power-folding third-row seat, heated 8-way power front seats Bluetooth, HD radio, AUX and USB inputs controlled Mercedes' COMAND infotainment system and dual-zone automatic climate control. Options include keyless entry and start, Harmon/Kardon audio system, adaptive headlamps and an automatic parking assist program.
The Audi Q7 also has seating for seven and a clean diesel engine option, as well as a beautiful interior, but it doesn't have as much space in town and is cumbersome to drive. The BMW X5 xDrive30d also has a clean diesel six-cylinder and is much more fun to drive, but the optional third-row is next to useless and it suffers from a hard ride. The INFINITI JX35 is very spacious for seven and much cheaper, but the V6 gas engine isn't as efficient and it's not as luxurious. The Acura MDX gets respectable fuel economy, is fun to drive and well-equipped for its low price, but it also lacks a lot of high-tech features available on the Mercedes and isn't as luxurious.
So the GL350 a great choice for those looking for a luxury SUV that can tow a lot, get respectable fuel economy and haul seven people comfortably. It might cost considerably more than the competition, but it might be a case of getting what you pay for.