After changing one turbo under warranty, the second one failed 2 weeks ago. The problem is that, the vehicle is not under warranty anymore ... the dealer want to charge me the new turbo 5.000 $ .
Is there a way to fix the turbo without changing it ? heard about lubricate or changing the actuator only ...???

as a precaution my local independent sprays the Turbo actuator linkage's with a lubricant to prevent the actuator from sticking, thus causeing the engine malfunction.
There is no way of getting to the actuator or turbo without taking the body off, and that is big bucks  07,TDV8,Black, Black Heated leather all round, Rear Entertainment with Headpones & Remote, TV, DVD, Pure Dab Digital Radio, Sidesteps, Adaptive Headlights, sunroof, now working fuel burning heater )))

The second (replacement) turbo should come with it's own warranty - how long ago was it fitted?

Is this a common problem - at a dealers over the weekend he ahd a TDV8 and had just replaced the turbo on it! - Range Rover Sport 4.4 V8 HSE G4 Challenge vehicle (FOR SALE)
- BMW 330Ci M-Sport coupe
- Suzuki GSX-R750 K6 'Stealth' - trackdays and high speed tourer

Mike the V8's come with 2 turbo's

what mileage is on the car? anything less than 100k and I'd be screaming the place down  ============
2010 TDV8 HSE - ooo laa laaaaaaaaa
2007 TDV8 HSE - superb car and very reliable
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2012 - dearly departed, sadly missed.. to return in late 2013 with a new TDV8!

^^^Depends on how its been driven,

always let mine idle for a bit before switching off... cool those turbos!

^^^+1

i used to do that on my toyota Supra, though ive never done it with the merc i had or the sport, as i never drove them hard enough  07,TDV8,Black, Black Heated leather all round, Rear Entertainment with Headpones & Remote, TV, DVD, Pure Dab Digital Radio, Sidesteps, Adaptive Headlights, sunroof, now working fuel burning heater )))