2011 Mercedes S-Class Owner's Manual - Page 82
2011 Mercedes S-Class Manual
Page 82 highlights
80 SmartKey G Warning Changing the battery You require a CR 2025 3 V cell battery. X Take the mechanical key out of the SmartKey (Y page 79). Batteries contain toxic and caustic substances. For this reason, keep batteries out of the reach of children. If a battery has been swallowed, seek medical help immediately. Opening and closing G Warning The SmartKey batteries contain perchlorate material, which may require special handling and regard for the environment. Observe government disposal guidelines. California residents, see www.dtsc.ca.gov/ HazardousWaste/Perchlorate/ index.cfm. Checking the battery X Press mechanical key ; into the opening in the SmartKey in the direction of the arrow until battery tray cover : opens. Do not hold the cover closed while doing so. X Press the & or % button. The SmartKey battery is working properly if battery charge indicator lamp : lights up briefly. X X If battery charge indicator lamp : does not light up briefly during the test, the SmartKey battery is discharged. X Replace the SmartKey battery (Y page 80). i You can obtain a SmartKey battery at any authorized Mercedes-Benz Center. i If the SmartKey battery is checked within signal range of the vehicle, pressing the & or % button results in the vehicle being locked or unlocked respectively. Remove the cover of the battery tray. Repeatedly tap the SmartKey against your palm until battery = falls out. X Insert the new battery with the positive pole facing upwards. Use a lint-free cloth to do so. X Insert the front tabs of the battery tray's cover first and then press to close it. X Check the function of all SmartKey buttons on the vehicle.