Hello, recently I bought a 635D E64 from 2008. The car loses oil under the engine compartment, according to a mechanic this comes from the turbo – another mechanic specializing in Bmw says this can not be attributed. The car takes (one might say) reluctant gas at under 2000 revolutions, respectively: The car has an incredible turbo hole. If one gives full gas accelerates the car with felt 50hp, until it is suddenly at about 2000-2500 revolutions, you notice j a speed up more than an old Citroen and push your head into the seat. I have now heard from mechanics different things: The first I think I have to change the turbo, another thinks it is just the small turbo and the third told me it can’t be the turbo, because then I have no power at all, or the problem for it occurs too irregularly – because partly I also roll towards a crossing, want to speed up and it just happens 3 seconds nothing, with you With the result that my Bmw specialist is now of the firm opinion: The problem is electronic, all mechanical be top. Does anyone have a clue to which I can give my mechanic to get further? He is finished with his Latin. Since I am not in Germany and he also speaks bad English, I am for every tip dan kbar. I hope I have not violated any problems of order of the forum, it is my first post. With best regards.