2009 Mercedes E-Class Owner's Manual - Page 318

Practical hints Vehicle status messages in the multifunction display Display messages Possible cause/consequence You are driving with at least one door open. The display symbol shows you which doors are open. Left Rear Backrest Not Locked or Right Rear Backrest Not Locked Key Detected In Vehicle Please don't forget your key. The rear seat backrest is not engaged. Possible solution X V ? Close all doors. X Adjust the rear seat backrest until it is fully engaged in position. I I A SmartKey with KEYLESS-GO left in the vehicle was recognized while trying to lock the vehicle from the outside. This display appears for a maximum of 60 seconds if the driver's door is opened with the engine turned off and no SmartKey in the starter switch. This message is only a reminder. You have forgotten to remove the SmartKey. The SmartKey is malfunctioning. The batteries in the SmartKey with KEYLESS-GO are discharged. X Take the SmartKey out of the vehicle. X Take the SmartKey with you when leaving the vehicle. I I I 316 Remove Key Please get a new key. Change Key Batteries X X X Remove the SmartKey from the starter switch. Contact an authorized Mercedes-Benz Center. Replace the batteries (Y page 346).