Under the Hood

Adapted from the engine in the S-Class sedan and SL-Class roadster, the all-aluminum, 5.0-liter V-8 produces 300 horsepower and 330 pounds-feet of torque. Each engine cylinder uses a three-valve, twin-spark setup. An electronically controlled five-speed-automatic transmission sends the power to a full-time four-wheel-drive system with Low range, which is fully synchronized for shift on the fly operation at up to 15 mph. Mercedes-Benzs lateral-skid control system, called Electronic Stability Program (ESP), also is installed.

    See also:

    Floormat on the driver's side
    WARNING Whenever you are using a floormat, make sure there is enough clearance and that the floormat is securely fastened. The floormat should always be securely fastened using the fastening ...

    4MATIC (permanent four-wheel drive)
    4MATIC ensures that all four wheels are permanently driven. Together with ESP and 4ETS, it improves the traction of your vehicle whenever a drive wheel spins due to insufficient grip. WARNI ...

    Seating & Cargo
    The GL550's front seats have a litany of power adjustments, including adjustable stiffness for the side bolsters. Even with the bolsters and lumbar support dialed all the way back, the seats are t ...