Premium-grade unleaded gasoline

performance of the engine, only premiumgrade To ensure the longevity and full performance of the engine, only premiumgrade unleaded gasoline may be used.
If there is no premium-grade unleaded gasoline available and regular-grade unleaded gasoline may be used; please observe the following precautions:
• only fill the fuel tank to half full with regular-grade unleaded gasoline and fill the rest with premium-grade unleaded gasoline as soon as possible.
• do not drive at the maximum speed.
• avoid sudden acceleration.
• if the vehicle is carrying a light load, e.g. two passengers without luggage, do not allow the engine to rev above 3,000 rpm.
• if the vehicle is fully loaded or is being operated in mountainous terrain, do not depress the accelerator pedal further than 2/3 of the pedal travel.

    See also:

    Switching the button lighting on/off
    Press button 2 on the remote control. Depending on the previous status, the button lighting is switched on or off. If you do not use the remote control for about 15 seconds, the button light ...

    Adjusting the head restraint heightelectrically
    ► To adjust the head restraint height: slide the switch for head restraint adjustment up or down in the direction of the arrow. ...

    INTERIOR
    In stark contrast to the fresh, forward-thinking exterior styling, the CLS550's interior comes off as stodgy and conservative. Frankly, it's got quite the boys-club feel inside. No luxury has been ...