The Mercedes-Benz GL 350 CDI BlueTEC 4MATIC G-TRONIC, produced from 2009 to 2010, represents a significant iteration of the first-generation GL (X164) luxury SUV following its facelift. Positioned as a diesel-powered offering within the GL lineup, it aimed to provide a balance of performance, fuel efficiency, and towing capacity for buyers seeking a large, capable SUV. This variant was particularly important in European markets where diesel engines held a strong preference, but also found a niche audience in North America. The GL-Class, overall, was Mercedes-Benz’s first entry into the full-size luxury SUV segment, competing directly with vehicles like the BMW X5, Audi Q7, and Cadillac Escalade.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | GL |
| Generation | GL (X164 facelift 2009) |
| Type (Engine) | GL 350 CDI BlueTEC (211 Hp) 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) | 12.1 l/100 km (19.4 US mpg, 23.3 UK mpg, 8.3 km/l) |
| Fuel consumption (extra urban) | 7.2 l/100 km (32.7 US mpg, 39.2 UK mpg, 13.9 km/l) |
| Fuel consumption (combined) | 9 l/100 km (26.1 US mpg, 31.4 UK mpg, 11.1 km/l) |
| CO2 emissions | 239 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 9.6 sec |
| Acceleration 0 – 62 mph | 9.6 sec |
| Acceleration 0 – 60 mph | 9.1 sec |
| Maximum speed | 210 km/h (130.49 mph) |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 11.4 kg/Hp, 87.4 Hp/tonne |
| Weight-to-torque ratio | 4.5 kg/Nm, 223.6 Nm/tonne |
| Power | 211 Hp @ 3400 rpm |
| Power per litre | 70.6 Hp/l |
| Torque | 540 Nm @ 1600-2400 rpm (398.28 lb.-ft. @ 1600-2400 rpm) |
| Maximum engine speed | 4500 rpm |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | OM 642.820 |
| 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 | 16.5:1 |
| 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 | 2415 kg (5324.16 lbs.) |
| Max. weight | 3150 kg (6944.56 lbs.) |
| Max load | 735 kg (1620.4 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) |
| AdBlue tank | 31.7 l (8.37 US gal | 6.97 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 (turning diameter) | 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 |
INTRODUCTION
The GL 350 CDI BlueTEC 4MATIC, launched in 2009 as part of the X164 facelift, offered a compelling blend of luxury, space, and diesel efficiency. It slotted into the middle of the GL range, positioned above the gasoline-powered GL 350 and below the performance-oriented GL 550. The facelift brought revised styling, improved interior materials, and updated technology, including the enhanced BlueTEC diesel emissions system. Built on the robust W164 platform, the GL aimed to provide a seven-passenger SUV experience with the refinement expected of a Mercedes-Benz.
Powertrain & Engine Architecture
At the heart of the GL 350 CDI BlueTEC lies the OM 642.820 3.0-liter V6 diesel engine. This engine is a sophisticated design featuring a common rail direct injection system, a variable geometry turbocharger, and an intercooler. The BlueTEC system, crucial for meeting stringent emissions standards, incorporates a selective catalytic reduction (SCR) system that uses AdBlue (diesel exhaust fluid) to reduce nitrogen oxide (NOx) emissions. The engine produces 211 horsepower at 3400 rpm and a substantial 540 Nm (398 lb-ft) of torque between 1600 and 2400 rpm. This torque output is a key characteristic of the engine, providing strong pulling power for towing and effortless acceleration. The engine utilizes a double overhead camshaft (DOHC) valvetrain with four valves per cylinder. Paired with the engine is the 7G-TRONIC seven-speed automatic transmission, known for its smooth shifts and efficiency. This transmission was a significant upgrade over older automatic gearboxes, offering a wider range of gear ratios for optimized performance and fuel economy.
Driving Characteristics
The GL 350 CDI BlueTEC delivers a driving experience focused on comfort and capability. The abundant torque from the diesel engine provides strong acceleration, especially in the lower and mid-range. While not a sports SUV, the 9.6-second 0-60 mph time is respectable for a vehicle of its size and weight. The 7G-TRONIC transmission contributes to a smooth and refined driving experience, with well-spaced gear ratios that keep the engine in its optimal power band. Compared to the gasoline GL 350, the CDI model offers significantly better fuel economy and a more relaxed cruising experience. However, it lacks the outright power of the GL 550. The automatic transmission, while smooth, doesn’t offer the same level of driver engagement as a manual gearbox, and some drivers may find the shift points slightly conservative.
Equipment & Trim Levels
The GL 350 CDI BlueTEC came standard with a generous array of features, reflecting its luxury SUV positioning. Standard equipment typically included leather upholstery, power-adjustable front seats with memory function, dual-zone automatic climate control, a premium audio system, and a power liftgate. Safety features were also comprehensive, including ABS, traction control, stability control, and multiple airbags. Optional extras included a navigation system, rear-seat entertainment system, panoramic sunroof, and adaptive suspension. Interior trim options allowed buyers to personalize the vehicle with different wood veneers and leather colors.
Chassis & Braking
The GL-Class features a robust chassis designed to handle its substantial weight and provide a comfortable ride. The front suspension utilizes a double wishbone design, while the rear employs an independent multi-link setup. This configuration provides a good balance of ride comfort and handling. The GL 350 CDI BlueTEC is equipped with ventilated disc brakes on all four wheels, providing ample stopping power. The 4MATIC all-wheel-drive system is standard, distributing power between the front and rear axles for enhanced traction in all weather conditions. The system operates automatically, adjusting power distribution based on driving conditions.
Market Reception & Comparison
The GL 350 CDI BlueTEC was generally well-received by automotive critics, who praised its fuel efficiency, comfortable ride, and spacious interior. The diesel engine was lauded for its strong torque and relaxed cruising ability. However, some reviewers noted that the GL felt large and cumbersome to maneuver in tight spaces. Compared to the gasoline GL 350, the CDI model offered a significant advantage in fuel economy, making it a more practical choice for drivers who cover long distances. Against competitors like the BMW X5 and Audi Q7, the GL 350 CDI BlueTEC offered a compelling combination of luxury, space, and diesel efficiency, although it often came with a higher price tag.
Legacy
The OM 642 engine family, including the OM 642.820 found in the GL 350 CDI BlueTEC, is known for its durability and reliability. With proper maintenance, these engines can accumulate high mileage without major issues. However, the BlueTEC system, with its AdBlue injection and associated components, can be prone to issues if not properly maintained. On the used car market, the GL 350 CDI BlueTEC represents a relatively affordable entry point into the luxury SUV segment. Its fuel efficiency and spacious interior make it a practical choice for families and those who need a capable tow vehicle. However, potential buyers should be aware of the potential maintenance costs associated with the BlueTEC system and ensure that the vehicle has been properly serviced.
