It refers to the tire monitoring system... Mainly meaning that one or more of the tires are either too high or too low in pressure. Check the pressure of each tire and make sure they are all at the required PSI (look on the inside of the drivers side door for the PSI) The 2007 Jettas have been having some problems with the tire pressure monitoring system, they are very sensitive, even a 1 % drop in pressure causes it to go on.
danger
The exclamation point is there to signify the shock that VW feels every time one of you suckers buys one. WOW!!!
The Lincoln navigator yellow exclamation point on the instrument panel, is an indication that the engine needs to be checked. The yellow color means caution.
That means your traction control is off. Control it with the ESP button on the dashboard. I leave mine off =P
The yellow exclamation point light on a Honda Accord is designed for the Vehicle Stability Assist system. It comes on when the vehicle is trying to maintain stability or when a tire is low.
Burned out exterior light bulb.
If the exclamation point is inside a yellow horseshoe, the tire pressure is low
A sentence ending in an exclamation mark may be an exclamation such as "Wow!" or "Boo!" or an imperative like "Stop!". It may also indicate astonishment.
It indicates intensity of emotion or loudness, and can indicate a writers astonishment
Tire pressure.
Caution or warning
The yellow exclamation point on the Nissan Versa is a tire pressure warning light. Many automobiles have this type of warning so that the driver can check tire pressure.