2012 Mercedes-Benz GL (X166) Dimensions, Size & Specs

The Mercedes-Benz GL (X166) offers a generous luggage capacity of 680 liters (24 cubic feet) with the rear seats in their upright position, providing ample space for everyday cargo needs. When the rear seats are folded down, this capacity dramatically increases to 2300 liters (81.2 cubic feet), allowing for transporting larger items or more luggage. This flexible interior space makes the GL (X166) an excellent choice for families or those needing versatile cargo solutions without compromising passenger comfort.

The curb weight of the Mercedes-Benz GL (X166) ranges from 2360 kg to 2505 kg (5,203 to 5,522 pounds), depending on the specific trim and equipment options. The maximum gross vehicle weight rating (GVWR) is 3250 kg (7,165 pounds). This means the GL (X166) is built to accommodate multiple passengers, cargo, and optional accessories safely. The relatively high GVWR also reflects its capabilities as a large luxury SUV with robust engineering designed for both comfort and performance.

Fitting the Mercedes-Benz GL (X166) into a standard residential garage depends on the garage size. The GL measures up to 5141 mm (202.4 inches) in length and 2141 mm (84.3 inches) in width including mirrors, with a height of 1850 mm (72.8 inches). Standard single-car garages typically have widths around 2.44 to 2.74 meters (8 to 9 feet) and lengths of about 5.5 to 6 meters (18 to 20 feet). While the GL’s length fits within many garage depths, its width including mirrors may be tight for narrower garages, requiring careful mirror folding before entry. Homeowners with wider-than-average garages should face no issues.

The Mercedes-Benz GL (X166) features a ride height or ground clearance of 201 mm (7.9 inches), which is relatively high for a luxury SUV. This elevated stance enhances its ability to handle rough terrain, moderate off-road conditions, and uneven surfaces more confidently compared to lower-profile SUVs. The higher ground clearance also improves water fording capability and overall approach and departure angles, making the GL (X166) suitable for both urban environments and light to moderate off-road adventures while maintaining ride comfort.

The Mercedes-Benz GL (X166) comes with multiple rim and tire size options suited to different performance and aesthetic preferences. It supports rim sizes including 18, 19, and 21 inches, with widths commonly around 8.5J x 19 being a popular configuration. Tire dimensions for this model include 265/60 R18, 275/55 R19, and 295/40 R21. These tire and rim combinations balance ride comfort, handling precision, and visual appeal, allowing owners to tailor the SUV for highway cruising or more dynamic driving conditions.

Compared to its predecessor, the Mercedes-Benz GL (X164), the X166 generation exhibits a slight increase in both exterior dimensions and curb weight. The X166 stretches to a length ranging from 5120 mm to 5141 mm (versus approximately 5115 mm for the X164), with a wider stance between 1934 mm and 1982 mm compared to roughly 1918 mm before. Height remains similar around 1850 mm. Curb weight increased from approximately 2300–2400 kg in the X164 to a range of 2360–2505 kg in the X166 due to added technology and luxury features. These changes enhance interior space particularly for rear passengers and cargo, along with overall stability.

When compared to contemporaries like the BMW X5 (F15) and Audi Q7 (4M), the Mercedes-Benz GL (X166) is generally larger in most critical dimensions. The GL’s length exceeds that of the BMW X5, which measures about 4886 mm (192.3 inches), and the Audi Q7, which is around 5052 mm (198.8 inches). Width with mirrors is also broader than both competitors’ typical widths near 1930-1970 mm without mirrors. The GL’s height of 1850 mm is competitive, and its ground clearance of 201 mm surpasses many rivals. This size superiority translates to more cabin and cargo space, appealing to buyers prioritizing spaciousness and presence.

The Mercedes-Benz GL (X166) introduced numerous technological and luxury upgrades compared to earlier models. It featured refined styling with a more aerodynamic silhouette, advanced safety systems such as attention assist and multiple airbags, and improved infotainment with Comand system integration. The air suspension system was enhanced for better ride comfort and off-road capability, while engine options included efficient diesel and petrol variants alongside powerful V8 units. Interior refinements focused on comfort with shifting to high-quality materials and expanding option packages such as heated/cooled seats and advanced driver assistance features.

The Mercedes-Benz GL (X166) has a roof load capacity of 100 kg (220 pounds), meaning it can safely carry additional equipment such as roof boxes, bike racks, or luggage carriers without risking structural damage or handling issues. This capability enhances the vehicle’s versatility, allowing owners to transport bulky or oversized items externally and freeing up interior passenger and cargo space. It is particularly beneficial for outdoor enthusiasts, families on long trips, or anyone needing extra gear transport capacity while maintaining vehicle balance and safety.