120 On-board computer Backup drive mode menu window X Select gear, neutral position or towing mode with the r or s button and confirm your selection with the u but- ton. The on-board computer displays the selec- ted direction of travel in the status area. General notes If the automated transmission shift system is malfunctioning, you may, under certain cir- cumstances, be able to continue your journey in backup drive mode. It is not possible to change gear in backup drive mode when the vehicle is in motion. The vehicle may respond abnormally in backup drive mode and therefore requires a high level of concentration on the part of the driver.
Backup drive mode remains switched on for as long as the ignition lock is in the drive position. When you take the key out of the ignition lock, backup drive mode is switched off. If backup drive mode is used when the transmission is cold, the on-board computer may not show the selected gear. Repeat the gear selection. If the on-board computer does not display the selected gear after you have tried to select a gear several times, switch off the engine. Start the engine again and select the gear. X If the Ready to start for 10 seconds menu window appears, depress the accel- erator pedal. When driving the vehicle in backup drive mode, the event window shows the Shift to neutral? message.
While the vehicle is in motion, you can only shift to transmission neutral position. You can find information on towing in the sec- tion "Manoeuvring, tow-starting and towing away" ( Y page 333). On-board computer and displays Audio and communications menu Alarm clock menu window If your vehicle is equipped with the Mercedes- Benz CD radio, you can set the CD radio as an alarm in alarm mode. If the alarm mode is set to Radio and the CD radio is switched on at the set alarm time, no further signalling takes place. Selecting shift position X Apply the parking brake. X Start the engine. X Using the u or t button, scroll to а driving mode. X To display the alarm time:
using the u or t button, scroll through to б audio and communications. The menu window shows: X Using the r or s button, scroll to the Backup drive mode menu window. The menu window shows Activate with "OK". . R the day of the week and the date X Press the 9 button. The menu window shows Is the park‐ ing brake applied? . R the alarm time for the з alarm clock R the alarm time for the ж alarm clock X To set the alarm clock: press the 9 but- ton. The input window shows: X Press the u button The input window shows:
R R for reverse gear R the alarm clock Alarm clock 1 / Alarm clock 2 R N for neutral R the alarm clock mode Audio / Buz‐ zer / Off R D2 for the fast gear, 6th gear R D1 for the slow gear, 2nd gear R the hour of the alarm time, e.g. 09 h R п for towing mode R the minute of the alarm time, e.g. 23 min