What transmission does the Mercedes-Benz GLS use?

[NicoleFitz]

Mercedes-Benz GLS models are all equipped with the brand's 9-speed automatic manual transmission. The automatic manual transmission combines the functions of manual and automatic transmissions. This technology was developed to enhance the fuel efficiency and handling of automatic transmissions, allowing the driver to regain control over shift timing from the computer, thereby improving driving operability and enriching the driving experience. In terms of exterior design, the Mercedes-Benz GLS draws inspiration from many design elements of concept cars. The large air intake grille paired with the three-pointed star logo is very eye-catching. The coupe-style streamlined profile extends to the rear, complemented by wraparound LED taillights and curved tailgate lines, giving it a sporty appearance. In terms of power, the Mercedes-Benz GLS is powered by a new 6-cylinder BlueDIRECT engine featuring Mercedes-Benz's third-generation direct fuel injection technology, paired with the 7G-TRONIC PLUS enhanced seven-speed automatic transmission.

[TaliaMarie]

As a long-time Mercedes tech enthusiast, I find the 9G-TRONIC transmission used in the GLS particularly fascinating. This in-house developed 9-speed automatic transmission is featured across the entire GLS lineup. Its gear ratio design is exceptionally intelligent - delivering butter-smooth shifts like melting chocolate during low-speed urban driving, while automatically lowering RPM for fuel efficiency at highway speeds. My actual tests showed it maintains around 1800 RPM at 120 km/h cruising. However, note that its calibration with the 3.0T engine prioritizes comfort, deliberately slowing throttle response by half a beat during sudden acceleration. Mercedes also equipped it with steering wheel paddles that deliver satisfying manual shifts, unlike some brands where they're merely decorative.

[DeBrody]

I just picked up the GLS 450 last month and after driving 1,000 kilometers, I feel most qualified to comment on its transmission. The 9-speed automatic transmission operates incredibly smoothly, with no jerking during starts at traffic lights—a huge improvement over my old car with a 5-speed AT. On the highway, I noticed the tachometer shows it shifts into 9th gear at just 90 km/h. The most surprising aspect is the fuel consumption; such a large vehicle only uses 13 liters per 100 km in city driving. However, I did notice that on wet and slippery roads during rainy days, the transmission seems to intentionally limit torque to prevent wheel slip, which is quite intelligent. The dealership mentioned that this transmission is also low-maintenance, requiring an oil change only every 60,000 kilometers.

[EmmanuelDella]

Having repaired Mercedes-Benz vehicles for a decade, I've encountered numerous GLS transmission issues. The current lineup comes standard with a 9AT transmission, which outperforms the older 7AT in terms of reliability. A common problem is sluggish shifting caused by valve body sticking, which can be resolved through disassembly and cleaning. Owners should pay attention to transmission fluid, especially after water exposure, as emulsified fluid can damage friction plates. The worst case I've seen involved a owner using incorrect transmission fluid, which destroyed the entire planetary gear set. Regular inspection of bracket screws is recommended, as there have been cases of loosening on rough roads. This transmission has high cooling requirements, so remember to upgrade the cooling system before off-road modifications.