What That Message Mean ?

[nyko46]

Every once in a while my 2009 E 320 Diesel gives me a not recognized message on my multi function display on the cluster.
This is what I get: Just after starting the engine the multi function display gets completely red colored with a figure of a battery in the center of it.
Approximately one minute latter everything goes back to the normal display.
I search for that in the owner manual but found nothing there.
What can be that kind of message?
Thanks