Mercedes-Benz SL-Class 2009 Owners Manual - Manual (Page 312)

Replacing SmartKey batteries
310
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 307).
1 Mechanical key
2 Battery compartment
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.
3 Batteries
4 Contact springs
X Pull out batteries 3 .
X 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.
X Slide mechanical key 1 back into the
SmartKey.
X Check the operation of the SmartKey as
well as the KEYLESS-GO function.
Practical hints