Mercedes-Benz 2009 E-Class Operator's Manual page 303

Display messages
G Warning!
If the 75 indicator lamp remains out even after performing the above corrective steps, do not have any children 12 years old
and under and other small individuals use the front passenger seat until the system has been repaired.
Vehicle status messages in the multifunction display
Possible cause/consequence Possible solution
soon as possible at an authorized Mercedes-Benz
Center.
Practical hints
Z
301