нашел мануал от М-ки:
батарейка CR2025 или аналогичная
вот мануаль скартинками
1. Release the lock knob at the back of the
Intelligent Key and remove the me-
chanical key.
2. Insert a flat-blade screwdriver j
A
wrapped with a cloth into the slit j
B
of
the corner and twist it to separate the
upper part from the lower part.
3. Replace the battery with a new one.
O Do not touch the internal circuit and
electric terminals as it could cause a
malfunction.
Recommended battery: CR2025 or
equivalent
Make sure that the ! side faces the
bottom of the case. The ! mark is
stamped on the bottom of the case.
4. Align the tips of the upper and lower
parts, and then push them together un-
til it is securely closed.
5. Push the buttons two or three times to
check its operation.
See an INFINITI dealer if you need any as-
sistance for replacement.
онлайн мануал для М-ки 2006 года:
http://www.fixya.com/cars/p699309-infiniti_2006_m45
пользуйтесь