Mercedes-Benz 2003 SL 55 AMG - Manual (Page 294)

294
Practical hints
Locking/unlocking in an emergency
KEYLESS-GO card*
1 Battery cover
Replacement batteries: Lithium, type
CR 2025 or equivalent.
̈ Pry open the cover 1.
̈ Remove the batteries.
̈ Install new batteries as indicated by
the “+” and “-” markings in the KEY-
LESS-GO card.
̈ Replace battery cover 1.