Gent & Ladies,
Recently noticed that there is almost 180K (km) passed...and what I've noticed is the slightly hearable noise coming under hood...it was coming only when I turned on engine in the mornings (in cold condition)...this noice was continue for 1-2 minutes and disappear after...then this slight noise became permanent after in about 1 week (couldn't find time to visit my service center)...and I was suspecting WHAT IT IS...just bought the Belts (for water pump & for AC comp), few PULLEYS (numbers 2,3 & 17 on below pic.)...to change this all for X5 2000 is ok...
So good news - after replacing above mentioned items this annoying noise dissappear!!!
Bad news - noticed that my radiator start (at the first stage) penetrate the liquid

, so need to plan another trip to service center for this...
For everybody info...180K time to change the belts, pulleys and most probably to check the radiator...Good Luck to All!
Thats my 2 cents...