Hi all,
I'm new here and hope thet I've posted this in the right place. I've got an A5 S line Cabriolet 2.0 tdi B8 2010. Recently, once the engine is warm, the car starts vibrating at over 50mph. I thought it might be a tyre or balancing problem. I replaced one of the front tyres as it had a ridge in it and got all of the wheels balanced. I thought the problem had gone, but have now realised thet it only does this once the engine is up to temperature. Its quite a severe vibration and under braking too, as I said this only happens at over 45-50mph. Has anyone experienced this before or does anyone have any idea of what it is likely to be?