2003 Mercedes E-Class Owner's Manual - Page 31

Getting started Unlocking Starter switch positions Warning! G ! If the key is left in starter switch position 0 for an extended period of time, it can no longer be turned in the starter switch. Remove the key from the starter switch and reinsert. If the key can still not be turned, the battery may not be sufficiently charged. Check the battery and charge it if necessary ( page 266). Get a jump start ( page 346). To prevent accelerated battery discharge or a completely discharged battery, always remove the key from the starter switch. When leaving the vehicle always remove the key from the starter switch, take the SmartKey with KEYLESS-GO* (if so equipped) with you and lock the vehicle. Do not leave children unattended in the vehicle, or with access to an unlocked vehicle. Unsupervised use of vehicle equipment may cause serious personal injury. Starter switch 0 For removing key 1 Power supply to some electrical consumers, such as seat adjustment 2 Ignition (power supply for all electrical consumers) and driving position 3 Starting position i The SmartKey can only be removed from the starter switch with the gear selector lever in position P. 31