2003 Mercedes SLK-Class Owner's Manual - Page 212

Practical hints Unlocking/locking in an emergency Changing batteries in remote control If the batteries in the remote control 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. Warning! When changing batteries, make sure that new batteries are clean and free of lint. The required replacement batteries are available at any Mercedes-Benz Center. Pull off battery cover 2 in direction of arrow. Remove the batteries. G Keep the batteries out of reach of children. If a battery is swallowed, seek medical help immediately. 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. Insert new batteries with the plus (+) side facing up. Press battery cover onto housing until it engages. 1 Release button for key 2 Battery cover Replacement batteries: Lithium, type CR 2025 or equivalent. Press release button 1 on the remote control. The key folds out. i Afterwards, test the remote control to see if it is functioning properly. If you still cannot lock or unlock the vehicle, synchronize the remote control ( page 213). i When changing batteries, always replace both batteries. 212