KresoF1:
Mike S:
Kreso, you are the Audi guru of this forum. Do you know if there is plans to use the V12 diesel engine in any other line up from Audi?
Mike,
V12 diesel although a masterpiece is a difficult engine to work with. Audi tried to put it in R8(there was a plan for limited run) but, matching gearbox currently do not exist.
Maybe it will be used in new A8. BUT, it is just maybe...
Since you decided to go for X5M my advice if you still want to get BIG diesel is new VW Touareg V8 TDI. Much, much better engine then old V10 TDI and much better gearbox(new 8speed tip).
P.S.
Regarding Audi... If you want to add Audi to your collection choice is limited to three models:
-R8 V10-only as manual
-new RS5
-S5 Sportback
Thanks Kreso, appreciate the feedback.
I don't think I will go for another Touraeg so long as the V10 is still here. It has been working flawlessly, so I'm going to keep it.
The ML has been giving me minor transmission problems, that is why I want to get rid of it. From time to time it gets stuck in a gear and I need to turn the car off for 30 minutes, before it resets and operates like normal. MB can't pick up any errors, so they refuse to replace anything
Plus I've never liked the interior, they did not do a great job IMO on the ML's from that aspect. Other than that is has been a fantastic car.
I will look at getting the R8 V10 at some point in the future. I'm waiting for that SL/CS (what ever it's going to be called) to come out 
Maybe on the new Q7, the V12 might still be there and it will be a car I can like 100% - at the moment as it is. I think there are still improvements to be made.