2009 Mercedes SLK-Class Owner's Manual - Page 313

Practical hints Replacing SmartKey batteries Replacing SmartKey batteries If the batteries in the SmartKey are discharged, the vehicle can no longer be locked or unlocked. It is recommended to have the batteries replaced at an authorized Mercedes-Benz Center. When inserting the batteries, make sure they are clean and free of lint. When replacing batteries, always replace both batteries. X X Insert mechanical key 1 into opening. Press mechanical key 1 in direction of arrow. Battery compartment 2 is unlatched. Pull battery compartment 2 out of the SmartKey housing. G Warning! Batteries contain poisonous and corrosive substances. Therefore, keep the batteries out of reach of children. If a battery is swallowed, seek medical help immediately. 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 http://www.dtsc.ca.gov/HazardousWaste /Perchlorate/index.cfm. Batteries contain materials that can harm the environment if disposed of improperly. Recycling of batteries is the preferred method of disposal. Many states require sellers of batteries to accept old batteries for recycling. i The required replacement batteries are available at any authorized Mercedes-Benz Center. Replacement batteries: Lithium, type CR 2025 or equivalent. X Remove the mechanical key from the SmartKey (Y page 308). X 3 Batteries 4 Contact springs X Pull out batteries 3. Insert new batteries 3 under contact springs 4 with the positive terminal (+) side facing up. Return battery compartment 2 into SmartKey housing until it locks into place. Z 1 Mechanical key 2 Battery compartment X X 311