2009 Mercedes CLK-Class Owner's Manual - Page 333

Practical hints Replacing SmartKey batteries 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. X Insert mechanical key 1 into opening. X Press mechanical key 1 in direction of arrow. Battery compartment 2 is unlatched. X Pull battery compartment 2 out of the SmartKey housing. X Slide mechanical key 1 back into the SmartKey. X Check the operation of the SmartKey as well as the KEYLESS-GO function. 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 320). 3 Batteries 4 Contact springs X X 1 Mechanical key 2 Battery compartment Pull out batteries 3. Insert new batteries 3 under contact springs 4 with the positive terminal (+) side facing up. X Return battery compartment 2 into SmartKey housing until it locks into place. Z 331