 From day one my 1999 Audi A4 has had problems.  I bought it used with low miles and the certificed / extended warranty.  It has had tons of electrical problems. I'm not sure what they did with when declared it a certified vehicle. the sensors and leaks continually need to be fixed.  I think it says it all when the dealer has a special service price to check the airbag light - $200 before repairs and then another $800 for the acutal airbag that is only five years old.  Even normal maintenance is just a rip-off, such as $1,000 for a new timing belt and water pump.  The water pump started leaking after the twelve month parts warranty.  Be strongly cautioned against "Audi workmanship."