2010 Mercedes S-Class Owner's Manual - Page 314

312 Driving and parking children unattended in the vehicle, as they could otherwise accidentally start the engine. When leaving the vehicle, always take the SmartKey with you and lock the vehicle. Do not leave children unattended in the vehicle, or with access to an unlocked vehicle. A child's unsupervised access to a vehicle could result in an accident and/or serious personal injury. Starting difficulties ! Remember that extended starting attempts can drain the battery. The engine does not start. You can hear the starter. There could be a malfunction in the engine electronics or in the fuel supply system. Carry out the following steps: X Controls in detail You can start your vehicle without the SmartKey in the starter switch using the KEYLESS-GO start/stop button. The SmartKey must be located in the vehicle. If you are starting the engine with the SmartKey: Turn the SmartKey in the starter switch to position 0 and repeat the starting procedure. X If you are starting the engine with KEYLESSGO: Close any doors that may be open to allow for better detection of the SmartKey. or X Remove the KEYLESS-GO start/stop button from the starter switch. X Start the engine with the SmartKey as radio signals from another source may be interfering with the KEYLESS-GO function. X Repeat the starting procedure. If the engine does not start after several starting attempts: X KEYLESS-GO start/stop button : USA only ; Canada only X Make sure the KEYLESS-GO start/stop button is inserted in the starter switch (Y page 284). Contact an authorized Mercedes-Benz Center or call Roadside Assistance. i To start the engine with the SmartKey instead of the KEYLESS-GO function, remove the KEYLESS-GO start/stop button from the starter switch. Proceed as described in "With SmartKey" (Y page 311). X The engine does not start. You cannot hear the starter. The battery may not be charged sufficiently. X Get a jump start (Y page 514). If the engine will not start despite a jump start: X Depress the brake pedal during the starting procedure. X Do not depress the accelerator pedal. X Press the KEYLESS-GO start/stop button once. The engine starts automatically. Contact an authorized Mercedes-Benz Center or call Roadside Assistance. The starter has been exposed to excessive temperatures. X Let the starter cool for about 2 minutes. X Repeat the starting procedure.