2003 Mercedes SL-Class Owner's Manual - Page 175

Controls in detail Driving systems Distronic activated When Distronic is activated the DTR symbol and the set speed are seen in the left display. Cruise control lever The Distronic system is operated by means of the cruise control lever. The cruise control lever is the uppermost lever found on the left-hand side of the steering column. Activating Distronic You can activate Distronic if you are driving over 25 mph (Canada: 40 km/h) ESP is activated ( page 70) When Distronic is activated the speedometer display will show a message such as DTR 60 mph. If Distronic is deactivated, the speedometer display will show the message DTR --- mph. In the following cases you cannot activate Distronic: 1 Set current or higher speed 2 Set current or lower speed 3 Deactivate Distronic 4 Resume at previously set speed up to two minutes after starting the engine when you brake if you have set the parking brake if the gear selector lever is in position P, R or N. 1 Symbol for activated Distronic 2 Set speed 175