vibration

Hey A2OC My A2 3L has some vibrations/noise when at around 1200-1800 RPM. It is only when pulling and not when revving in neutral. I tried replacing the lower dogbone engine mount. It did not seem worn out, and the replacement did not help the problem. What could it be?

'04 tdi90 130,000 miles. I get vibration, felt partly through the steering wheel and mainly through the brake pedal. The discs don't bind in neutral, rolling gently forwards, and there is no vibration if I brake steadily from moderate speed, say 40 mph. If I brake at higher speeds, the...