BMW: BMW Check Engine AND Red Disc light came on, self hope, scan tool

Question
I have a 97 328i convertible with 68K miles -- I no longer have the
owners manual -- Two days Assuming it is refering to the brakes but,
what about the brakes?  Can you gives me a couple of suggestions.  

AND

Just today, the Check Engine Light came on! What can this mean? The gas
cap is on properly.   

The car runs nicely and I hear/feel nothing unusual about the brakes or
engine...  Thank you!  

Answer
Brian,
 As I put in my stats, I am not very knowledgable about the E36, but know more about the older E30 3-series.  I'm pretty sure this "brake disc" means that your brake pads are getting low, and the sensor is reporting so.  The check engine can light up for MANY reasons.  To find out this reason, you have to take the car to a shop that has a scan tool, and have them read the fault codes.  Your car will tell the mechanic what is wrong with it's self.

 Hope this helps,
 Josh