2010 Mercedes GL-Class Owner's Manual - Page 328

326 Replacing SmartKey batteries Comfort head restraints 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! Practical hints X Take reset tool : out of the MercedesBenz literature pouch. X Guide reset tool : into rectangular opening ; between head restraint cushion and head restraint cover. X Press reset tool : downward in direction of arrow until you hear the head restraint release mechanism audibly engage. X Pull out reset tool :. X Firmly press the head restraint cushion backward towards the head restraint cover in direction of arrow = until it engages. X Repeat this procedure for the second front seat. X After resetting the NECK-PRO active front head restraints store reset tool : in the Mercedes-Benz literature pouch. For information on NECK-PRO active front head restraints, see "NECK-PRO active front head restraints" (Y page 53). 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 (USA only) or provinces (Canada only) require sellers of batteries to accept old batteries for recycling. When inserting the batteries, make sure they are clean and free of lint. When replacing batteries, always replace both batteries. 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 323). 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.