2010 Mercedes E-Class Owner's Manual - Page 252

250 Vehicle status messages in the multifunction display Display messages Possible causes/consequences and M Solutions The left or right rear seat backrest is not engaged. X Adjust the rear seat backrest until it is fully engaged in position. _ Rear Left Backrest Not Latched or Rear Right Backrest Not Latched Take Your Key From Ignition Obtain A New Key Close Doors To Lock Vehicle Key Does Not Belong to Vehicle Replace Key Battery Key Not Detected (message appears in red) Practical hints + + + + + + You have forgotten to remove the SmartKey. X Remove the SmartKey from the starter switch. The SmartKey is malfunctioning. X Contact an authorized Mercedes-Benz Center. You tried to lock the vehicle but not all doors were closed. X Close doors and lock the vehicle again. The SmartKey in the starter switch does not belong to the vehicle. X Remove the SmartKey from the starter switch. The batteries in the SmartKey with KEYLESS-GO are discharged. X Replace the batteries (Y page 274). The SmartKey with KEYLESS-GO is not detected while the engine is running because the SmartKey is not in the vehicle. X Stop the vehicle as soon as it is safe to do so. X Engage the parking brake. X Search for the SmartKey. The vehicle cannot be locked centrally nor can the engine be started again after the engine is stopped.