Hi, I have an A4 (1995) and recently I had a problem with an oil leak which coincided with the engine making an awful high-pitched noise when I slowed and changed to a lower gear. The leak was fixed and all seemed OK but 24 hours later the noise was back. I took it back to the mechanic - he drove it and there was no noise. The next day the noise is back again and this time I really notice it when I'm turning the steering wheel. Has anyone had a similar experience? I'd welcome any feedback.