I noticed something worrying on my Superb the other day. The DSG sounds rough on down changes between 4th and 3rd. Not quite a shudder but a noisy down change. Doesn't appear to happen with other gears. Should i be worried? The car is a MY13 (late 2012 build) so it should have the updated mechatronics unit (right?). Any pointers for what else to look for would be appreciated.

Thanks