You may want to check the manual as there are certain circumstances when the keyless access is deactivated. Is it possible that you are accidentally causing this to happen?
1. If the vehicle is not unlocked for an extended period, the function is deactivated. The func-
tion will reactivate the next time that the vehi-
cle is unlocked with the remote control.
2. The “Keyless Access” system’s unlocking func-
tion can be temporarily deactivated:
● Move the gear lever to position P since oth-
erwise the vehicle cannot be locked.
● Lock the vehicle using the button on the
vehicle key.
● Within 5 seconds, touch the sensor on the
outside of the door handle ››› Fig. 69 B
once. Do not grip the handle while doing so.
This temporarily deactivates the Keyless Ac-
cess system.
● Check that it is deactivated by pulling the
door handle after at least 10 seconds. It should
not be possible to open the door.
The next time, the vehicle can only be un-
locked electronically with the vehicle key. After
being unlocked the next time, the Keyless Ac-
cess system will be activated again ››› .