2011 Mercedes R-Class Owner's Manual - Page 80

78 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 77). Batteries are toxic and contain caustic substances. For this reason, keep batteries out of the reach of children. If a battery has been swallowed, visit a doctor immediately. Opening and closing G Warning SmartKey batteries contain perchlorate material, which may require special handling and regard for the environment. Check with your local government's disposal guidelines. California residents, see www.dtsc.ca.gov/ HazardousWaste/Perchlorate/ index.cfm. Checking the battery X Press the mechanical key into the opening in the SmartKey in the direction of arrow ; until cover : of the battery tray opens. Do not hold the cover closed while doing so. X Press the & or % button. The 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 key batteries are discharged. X Changing the key battery (Y page 78). i Consult any authorized Mercedes-Benz Center for a key battery. i If the battery is tested within the signal range of the vehicle, you can open or close the vehicle by pressing & or % 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.