The Mercedes-Benz GL 350 CDI BlueEFFICIENCY 4MATIC G-TRONIC, produced from 2009 to 2010, represents a mid-cycle refresh of the first-generation GL (X164) full-size luxury SUV. Positioned as a diesel-powered offering within the GL lineup, it aimed to provide a balance of performance, fuel efficiency, and towing capacity for the North American and European markets. This variant featured a 3.0-liter V6 turbodiesel engine paired with a seven-speed automatic transmission and Mercedes’ 4MATIC all-wheel-drive system. The “BlueEFFICIENCY” designation indicated the inclusion of technologies designed to reduce emissions and improve fuel economy. It sat in the middle of the GL range, offering a more economical alternative to the gasoline-powered GL 450 and GL 550 models, while providing more power and refinement than the base GL 320 (where offered).
Technical Specifications
| Brand | Mercedes-Benz |
| Model | GL |
| Generation | GL (X164 facelift 2009) |
| Type (Engine) | GL 350 CDI (224 Hp) BlueEFFICIENCY 4MATIC G-TRONIC |
| Start of production | 2009 |
| End of production | 2010 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 7 |
| Doors | 5 |
| Fuel consumption (urban) | 11.9 l/100 km (19.8 US mpg, 23.7 UK mpg, 8.4 km/l) |
| Fuel consumption (extra urban) | 7.7 l/100 km (30.5 US mpg, 36.7 UK mpg, 13 km/l) |
| Fuel consumption (combined) | 9.3 l/100 km (25.3 US mpg, 30.4 UK mpg, 10.8 km/l) |
| CO2 emissions | 244 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 9.5 sec |
| Acceleration 0 – 62 mph | 9.5 sec |
| Acceleration 0 – 60 mph | 9 sec (Calculated) |
| Maximum speed | 210 km/h (130.49 mph) |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 10.6 kg/Hp, 94.3 Hp/tonne |
| Weight-to-torque ratio | 4.7 kg/Nm, 214.7 Nm/tonne |
| Power | 224 Hp @ 3800 rpm |
| Power per litre | 75 Hp/l |
| Torque | 510 Nm @ 1600-2800 rpm (376.16 lb.-ft. @ 1600-2800 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | OM 642.940 |
| Engine displacement | 2987 cm3 (182.28 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 83 mm (3.27 in.) |
| Piston Stroke | 92 mm (3.62 in.) |
| Compression ratio | 18:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 8.5 l (8.98 US qt | 7.48 UK qt) |
| Kerb Weight | 2375 kg (5235.98 lbs.) |
| Max. weight | 3150 kg (6944.56 lbs.) |
| Max load | 775 kg (1708.58 lbs.) |
| Trunk (boot) space – minimum | 620 l (21.9 cu. ft.) |
| Trunk (boot) space – maximum | 2300 l (81.22 cu. ft.) |
| Fuel tank capacity | 100 l (26.42 US gal | 22 UK gal) |
| Permitted trailer load with brakes (12%) | 3500 kg (7716.18 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Length | 5099 mm (200.75 in.) |
| Width | 1920 mm (75.59 in.) |
| Height | 1840 mm (72.44 in.) |
| Wheelbase | 3075 mm (121.06 in.) |
| Front track | 1651 mm (65 in.) |
| Rear (Back) track | 1654 mm (65.12 in.) |
| Ride height (ground clearance) | 198 mm (7.8 in.) |
| Drag coefficient (Cd) | 0.36 |
| Minimum turning circle | 12.1 m (39.7 ft.) |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 7 gears, automatic transmission G-TRONIC |
| Front suspension | Double wishbone |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size | 265/60 R18 |
| Wheel rims size | 18 |
Powertrain & Engine Architecture
The GL 350 CDI was powered by the OM 642.940 3.0-liter V6 turbodiesel engine. This engine utilized a common rail direct injection system, delivering fuel at extremely high pressures for optimized combustion. The engine featured a variable geometry turbocharger (VGT) and an intercooler to enhance power and efficiency. The V6 configuration provided a good balance of smoothness and power delivery. The engine’s DOHC (Double Overhead Camshaft) valvetrain, with four valves per cylinder, further contributed to its performance. The seven-speed 7G-TRONIC automatic transmission was a key component, offering smooth and efficient gear changes. This transmission was known for its adaptability, adjusting shift points based on driving conditions and driver input. The 4MATIC all-wheel-drive system provided enhanced traction and stability, particularly in adverse weather conditions.
Driving Characteristics
The GL 350 CDI Automatic offered a comfortable and capable driving experience. While not as quick as the gasoline-powered GL models, the 510 Nm (376 lb-ft) of torque available from 1600-2800 rpm provided ample power for everyday driving and towing. The 7G-TRONIC transmission was well-matched to the engine, providing smooth upshifts and downshifts. The automatic transmission, while convenient, did result in a slightly less engaging driving experience compared to the available manual transmission in some markets. Acceleration from 0-60 mph took around 9 seconds, which was adequate for a vehicle of this size and weight. The 4MATIC system provided confident handling in various conditions, and the suspension offered a comfortable ride, although it could feel somewhat floaty due to the vehicle’s size and weight.
Equipment & Trim Levels
The GL 350 CDI BlueEFFICIENCY typically came well-equipped with standard features such as leather upholstery, power-adjustable front seats, dual-zone automatic climate control, a premium audio system, and a power liftgate. Optional extras included a navigation system, rear-seat entertainment system, panoramic sunroof, and various driver-assistance features like parking sensors and blind-spot monitoring. Trim levels were relatively limited, with most options being added individually. Interior color schemes typically included shades of gray, black, and beige. The dashboard layout was typical of Mercedes-Benz at the time, featuring a blend of wood trim and metallic accents.
Chassis & Braking
The GL 350 CDI utilized a robust chassis designed to handle the vehicle’s weight and provide a comfortable ride. The front suspension featured a double wishbone design, while the rear suspension employed an independent multi-link setup. This configuration helped to isolate the cabin from road imperfections. Braking duties were handled by ventilated discs on all four wheels, providing ample stopping power. The GL 350 CDI was equipped with ABS (Anti-lock Braking System) and electronic stability control as standard safety features. Stabilizer bars were fitted to both the front and rear axles to reduce body roll during cornering.
Market Reception & Comparison
The GL 350 CDI was generally well-received by automotive critics. It was praised for its fuel efficiency, comfortable ride, and spacious interior. However, some reviewers noted that its acceleration was not as brisk as some of its competitors. Compared to the GL 450, the 350 CDI offered significantly better fuel economy, making it a more attractive option for those who prioritized efficiency. Compared to the GL 550, it provided a more affordable entry point into the GL lineup, albeit with less power. The diesel engine’s higher torque output made it a capable towing vehicle, appealing to buyers who needed to haul trailers or boats. Reliability reports were generally positive, although diesel engines can be more expensive to maintain than gasoline engines due to the complexity of the fuel injection system and emissions control equipment.
Legacy
The Mercedes-Benz GL 350 CDI BlueEFFICIENCY 4MATIC G-TRONIC has proven to be a relatively durable vehicle in the used car market. The OM 642 engine is known for its longevity when properly maintained. However, potential buyers should be aware of the potential for issues with the diesel particulate filter (DPF) and the fuel injection system. The 7G-TRONIC transmission is generally reliable, but regular fluid changes are essential. Today, these vehicles offer a compelling combination of luxury, space, and fuel efficiency, making them a popular choice for buyers seeking a capable and comfortable SUV. The X164 GL laid the foundation for subsequent generations of the GL-Class, establishing it as a key model in Mercedes-Benz’s SUV lineup.
