tire pressure
you have to put air in your tires. That's what the exclamation point signifies
You need brake fluid
Tire pressure warning light.
It means you need to change your oil.
The service engine soon light on the car dashboard to alert the driver to a problem with the car. A specialized computer scanner or code reader can diagnose the issue.
yes they´ll fit
its the low tire pressure warning. check your tires
You have stepped on the brakes
On a 2004 G35 sedan, the low pressure indicator light looks like in the following picture http://www.bartecusa.com/images/300/tpms_replacement_1.jpg
I had a similar problem on my 2006 G35. All I had to do was check the tire pressure on all wheels and fill them back up to spec; the light went off by itself.
Sorry, only some G35's come with back-lit steering wheel functions.
There is none. Just fill up your tires to the proper inflation and the light will go off.