The 2008 GL550 SUV

Engine and Drivetrain
Engine 5,461-cc DOHC 32-valve V-8. Aluminum alloy cylinder block.
Net power 382 hp @ 6,000 rpm
Net torque 391 lb-ft @ 2,800 — 4,800 rpm
Compression ratio 10.7:1
Fuel requirement
Premium unleaded gasoline.
Fuel tank (capacity - reserve) 26.4 gal - 3.4 gal
Fuel and ignition system Sequential multipoint electronic fuel injection and single-spark ignition. 2-stage resonance intake manifold.
Transmission Standard driver-adaptive 7-speed automatic with column shifter. Electronically controlled shifting. The column shifter provides convenient selection of Park, Reverse, Neutral, and Drive. Steering-wheel-mounted shift buttons allow for Touch Shift gear selection. Touch Shift with fingertip shift controls allows driver to manually downshift and allow upshifts in Drive, via rocker buttons behind the upper steering-wheel spokes. Driver-adaptive programming adjusts shift points to the driver's current driving style. Selecting off-road driving program raises shift points automatically. Shift into Optimum Gear programming allows one-touch selection of the best gear for maximum acceleration or engine braking by holding a Touch Shift button in the downshift position for one second. Driver-selectable Comfort mode starts vehicle moving in 2nd gear or 2nd Reverse gear, and upshifts at lower rpm to help improve control on slippery surfaces.
Drive configuration 4-wheel drive, with 50/50 front/rear torque split.
Front and rear axle ratios 3.7:1
Off-road driving program One-button off-road program allows driver to simultaneously engage programming recalibrations of the traction system, antilock brakes, engine management, and automatic transmission designed to enhance control in conditions typical of off-highway driving.1
Downhill Speed Regulation (DSR) Driver-activated DSR automatically modulates the throttle, brakes, and ABS to maintain a preset crawl speed when descending hills. Speed is preprogrammed at 4 mph but may be adjusted between 3 mph and 10 mph via the multifunction steering wheel. DSR can be used when the gear selector is in Drive or Reverse. Driver can override DSR by pressing the accelerator or switching DSR off via its console-mounted switch.
Hill-start assist To help prevent unwanted vehicle rollback when taking off from a stop on uphill or downhill grades (15 percent or over), hill-start assist automatically maintains brake pressure for approximately one second after the driver releases the brake pedal. The system is automatically deactivated when the vehicle is level, the gear selector is in Park or Neutral, or the parking brake is set.
1. Off-road driving should only be attempted by drivers with the necessary skill, experience and understanding of the vehicle's limits.
* MSRP includes $775 transportation and handling charge and excludes all taxes, title/documentary fees, registration, tags, Mercedes-Benz Dealer prep, labor and installation charges, insurance, optional equipment and accessories, certificate of compliance or non-compliance fees, and finance charges. Actual prices may vary by dealer.
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