Boys wanted to warn you about what happened to me with a Touareg R5 2.5 ..
I was traveling at about 120 km, all ok, as I slowed down when the car riaccellerare vibrated abnormally .. I went to VW for inspection, diagnosis, and: the number 4 piston is hollow because the spray innettore not good diesel!
Moral of the story there are parts more about 5150 euro 3000 euro for labor to fix it with a guarantee on one block of 2 years to changing the piston (200 euros) and inniettore (510 euro + VAT) and adjusting the cylinder (600 euro ) plus $ 2000 for labor for a total of about 3,400 euros a VW does not guarantee that will probably happen soon on another cylinder! in fact I have recommended in the workshop and they told me the same thing toll VW assistance luxurity that Italy is not as rare as they were advised to give complete engine change to 11000 euros, and in that case the guarantee is 2 years on labor and excluding the engine turbine, alternator, gearbox and clutch! guys be careful because my car is out of warranty but it has 101000 km mostly highway made approximately 120 130 km per hour!
I can tell .. wishes to all .. for what concerns me the VW has closed with me.