2009 Mercedes SL-Class Owner's Manual - Page 266

Practical hints Vehicle status messages in the multifunction display Display messages DTR DISTRONIC Override Currently Unavailable. See Oper. Manual Possible cause/consequence You have accelerated. The Distronic has switched off. Distronic is deactivated because: RThe Distronic cover in the radiator grille Possible solution X Stop accelerating. If necessary, clean the Distronic cover in the area of the radiator grille (Y page 246). If necessary, wait until the system has cooled down. Restart the vehicle. X X X is dirty. RThe RThe functionality is impaired by heavy precipitation or fog system is overheated. Distronic becomes operational again without the engine being restarted when: Rdirt Rthe on the radiator grille has fallen off while driving (e.g. slush or snow) system recognizes full sensor availability (due to lessening rain or the road surface drying) message in the multifunction display disappears Rthe You can then operate Distronic as usual again. 264