AUDI A5 multitronic issue (non german speaker)

Dear all,

Sorry I have to post in english as I do not have enough german skill to have a technicall discussion in german with you.

Hope the post is in the right category. And sorry to clone this topic which I guess is already highly covered on the forum)

I am looking for some information about a multitronic gearbox that do not works any more on a 2007 Audi A5 with 2.7L diesel V6 engine.

I explain what happened on the car :

- The car was going fine on the highway (100 - 130km/h)

- Stop at the toll to pay

- restart from the tol

- few minutes later traction lost, engine turning alone

- stop on the right of the highway

- no warning light everythings appears as being normal

- no response of the gearbox on any position

- do no feel anymore ...