2004 Mercedes E-Class Owner's Manual - Page 356
2004 Mercedes E-Class Manual
Page 356 highlights
Practical hints Unlocking/locking in an emergency Using a lint-free cloth, insert new batteries under the contact spring with the plus (+) side facing up. Return battery compartment into housing until it locks into place. SmartKey with KEYLESS-GO* Pull the battery compartment out of the SmartKey housing in direction of arrow. Using mechanical key 3 apply pressure to position 2. Battery 1 tilts up slightly. Pull out batteries 1 in direction of arrow. 1 Battery 2 Tilt battery up 3 Mechanical key Replacement batteries: Lithium, type CR 2025 or equivalent. Remove mechanical key ( page 353). Insert the mechanical key in side opening and push grey slide. The battery compartment is unlatched. Using a lint-free cloth, insert new batteries with the plus (+) side facing up. Return battery compartment into housing until it locks into place. i When changing batteries, always replace both batteries. The required replacement batteries are available at any Mercedes-Benz Center. 356