I have a 2012 Cupra R. I drove with the radio off the other day and noticed under engine breaking a noise which sounds like it's underneath the gear stick area. Let's say I'm in second and before I get chance to up change I take the foot off the gas there sounds like a bit of a 'chuff' sound. It happens under engine breaking for a split second. My car is low mileage only 9500 miles but just wondered if this is normal?