Mazda 6 Owners Manual: Message Indicated on Display
If a message is displayed in the center display, take appropriate action (in a calm manner) according to the displayed message.
KEY Warning Light (Some models)
Take the appropriate action and verify that the warning light turns off.
...
Stop Vehicle in Safe Place Immediately
If the following messages are displayed in the center display , a vehicle system
may be malfunctioning. Stop the vehicle in a safe place and contact an Authorized
Mazda Dealer.
...
Other materials:
Mazda 6 Owners Manual: Key Battery Replacement
If the buttons on the transmitter are inoperable and the operation indicator
light does not flash, the battery may be dead.
Replace with a new battery before the transmitter becomes unusable.
CAUTION
Make sure the battery is installed correctly. Battery leakage could occur
if it is not in ...
Mazda 6 Owners Manual: Instrument cluster removal/installation
Caution
When replacing the instrument cluster, the configuration procedure must be
performed before removing the instrument cluster. If the configuration procedure
is not performed before removing the instrument cluster, it is possible that the
instrument cluster will not operate normally. ...