2005 bmw X5 Diesel -- POWER PROBLEM ( BIG POWER PROBLEM )


My x5 is gone as slow as hell,, takes about 15 seconds to reach 60mph and it should do it in 8.5 seconds
the car is 218 bhp and feels like its 50bhp

milage is 110,000 Miles
I changed air filter,and fuel filter , disconnected maf sensor (made no difference)
No dashboard lights are showing up ,,,
No Big ammount of smoke cumn off engine !
Help PLZ !! anyone got any ideas !
shouldnt be the turbo because theres no oil in the intakes and oil level is perfect !! its not burning oil