Vibrating noise coming from the car, please help

[mjpw12]

Hello

Re: peugeot 106 graduate

I hope that you can help me. When i start my car in the morning there is a vibration buzzing noise coming from the car. When i rev the engine it disappears when i apply the gas it disappears. But when i am idling it comes back. I have felt the vibration through the pedals although i do not know if it is clutch based. The exhaust has been replaced recently and the car had a service in december. When the car is moving the sound/vibrations disappear ie when i apply the gas. When the car has been running for a while the vibrations/sound disappear when idle

Apart from this the car run fine. But as this has only been going on a week i do not know if something is going to die on it very soon.

Please help