2009 Mercedes R-Class Owner's Manual - Page 357

Practical hints Replacing SmartKey batteries i For your convenience, we recommend that you have this work carried out at an authorized Mercedes-Benz Center. 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. 1 Pull 2 Adjust downward 3 Press X X Pull the top of the head restraint cushion in direction of arrow 1 as far as it will go. Adjust the head restraint cushion downward in direction of arrow 2 as far as it will go. Firmly press the top of the active head restraint cushion towards the head restraint cover in direction of arrow 3 until it engages. Repeat this procedure on the active head restraint for the second front seat. 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 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 353). X X For information on active head restraints, see "Active head restraints" (Y page 64). 1 Mechanical key 2 Battery compartment Z 355