to the audi intelligent-
Before I start... I must confess, I am no mechanic. I have three car problems I would love some advice on before I get strangled by my overzelous mechanic.
1) When I am driving between 40 and about 70 and gently apply the brakes a get a soft thumping sound. When I press harder, it stops making the sound. The brakes work fine other than this sound. But it does sound bad. What is wrong? How much is it going to cost me to fix this?
2) This one has a lot of parameters. When it is hot and I am driving in traffic at low rpms and the AC is on, when I press teh gas it makes a soft but harsh grinding sound until the RPMs get higher, at that point (2500 to 3000 rpms) the the sound disapears. During the time that this grinding noise is happening, the acceleration is not so good. The AC works very well, but when it is off, the car makes no such sound. What is wrong? How much is it going to cost me to fix this?
3) Sometimes when I first press the gas the engine feels like it clunks once before it accelerates. I've heard this described as an engine mount problem. DOes this sound right? $$?
If you guys can help me I will be forever in debt. Thank you.