Tommo2007

Hi guys can anyone help? Just purchased a second hand C220 2008, 87,000miles. All was good for a few days and then noticed a whining noise whenever I lifted off the accelerator pedal. It would stop just before the car comes to a stand still. Strange thing is that it would go after the car has travelled a few miles. Get in the car in the morning and it would do exactly the same thing..... any ideas on the cause and what’s needed to fix it?