A45 AMG diff problem?

[KinseyYJB]

Hi guys,

I took delivery of my 64plate A45 AMG on Saturday. (51k miles)

Yesterday morning I noticed a clunk noise at the rear when turning while doing just over manouvering speed.

I called the dealer, who said this was normal on a 4WD.

It seemed a little worse today so I called into the MB dealer, who again said it was normal, but agreed to go for a test drive with me.

He heard the noise, this time quite quiet, and agreed it was normal, but a little further down the road, it did it a lot louder, which he was concerned by, so took a mechanic out in it. He told me it appears the diff might have gone, and to check with the garage regarding warranty. He said it was still fine to drive though.

Anyway, I took it home and needed to use it a few hours later.

This time it was way worse. Horrible grinding noise and more or less constant so I turned back and when I pulled on the drive, there was a huge patch of oil which appears to have come from the rear centre of the car.

I'm no mechanic by the way.

So, my question is, does anyone know what this could be, is it the diff?

Any help is appreciated.