329 Practical hints
Unlocking/locking in an emergency
SmartKey/SmartKey with KEY-
LESS-GO*
1Mechanical key
2Battery compartment
Replacement batteries: Lithium, type
CR 2025 or equivalent.
Remove mechanical key1
(page 327).
Insert the mechanical key in the side
opening and push the gray slide.
Battery compartment2 is unlatched.
Pull battery compartment2 out of the
key housing in direction of arrow.
3Battery
4Contact spring
Remove the batteries.
Using a lint-free cloth, insert new bat-
teries under the contact spring with the
plus (+) side facing up.
Return battery compartment into hous-
ing until it locks into place.
Fuel filler flap emergency release
1Release knob
Remove right-side tail trim.
Turn release knob1 clockwise (arrow).
The fuel filler flap can know be opened.
iWhen changing batteries, always re-
place both batteries.
The required replacement batteries are
available at any authorized
Mercedes-Benz Center.
