Flashing Brake Light??

[Rafhia]

Hello everyone,
The This group was so helpful when I first brought this used car, so I am
hoping that you can help me with another problem. I have a 1988 Audi 5000
CS, that has developed a problem, that I need to fix right away. Brake light
warning came on when I turned it on this morning and I'm not too sure if
this is an indication that I need new brakes or just need more or new brake
fluid. I pulled out the Hayes manual so I could locate the brake fluid
resevior and added some more fluid. From what I could see inside, it seemed
like there was fluid in there. When I added more the line of fluid really
didn't move. When I started the car again the "OK" light came on and
everything seemed fine. Then I turned off the car so I could put the fluid
in the trunk. I decided to turn it on one more time just to make sure that
the car was okay, but the light came on again. Could you guys give me some
indication of what the problem could be. I would like to fix this myself if
at all possible. The last 2 times we went to the mechanic (for a new
radiatior, replacement of hoses and belts, pump, etc) it cost us over
$1,000. I didn't realize how hard it is to maintain an Audi on a grad
student budget.
Does anyone have any ideas/ suggestions or know any good inexpensive
mechanics in the Philadelphia area?
ANY help or advice would be GREAT!
Thanks in advance

Rafhia Foster-Hamilton
rafhia.hamilton at verizon.net