2006 Mercedes SLK-Class Owner's Manual - Page 256

Controls in detail Retractable hardtop Locking the retractable hardtop after raising/lowering Warning! Warning! G Warning! G G Be sure to keep the hardtop switch pushed until the hardtop is fully opened or closed. The hydraulic pump will then shut off. To prevent possible accidents, drive the vehicle only with the hardtop either completely closed and locked, or fully lowered into its storage compartment. If the retractable hardtop does not completely open or close, the roof hydraulics will lose pressure and the retractable hardtop is lowered after approximately 7 minutes when the ignition is switched on. after approximately 15 seconds when the ignition is switched off. Shortly before the hardtop is lowered, a warning will sound. In the multifunction display you will see K and the message Retractable roof being opened. Properly lock the retractable hardtop before continuing to drive ( page 256). The hardtop is not fully closed and locked or not fully opened and locked if: the message Retractable roof in operation is shown in the multifunction display a warning sounds for 10 seconds when driving and a message in the multifunction display appears ( page 381). If the retractable hardtop is not properly locked, lock it as described below. 255