Brake problem?
 

Hello i have a 04 a6 2.7T Quattro. When i accelerate it works perfectly but when i let off the gas it takes about 3-4 secs then it feels like a huge stoppage happens. The car just feels like it is going super slow while it only lost about 2-3mph. I am guessing brakes or ebrake is stuck. Any idea about a fix?