Hello guys, I really need your help. I drive a Mini Cooper S R56 174 HP year 12/2007. For some time I have had problems with my sweetheart. When it’s cold in the morning, the engine runs very restless, the speed jumps slightly in the range of 800 and 2000 and the engine control people goes on. I was also already in the BMW workshop, which said it could VIELLEICHT lie on a defective high pressure pump (cost 500€). The error goes after 2 km by itself w eg, if the engine has some temperature. But for a maybe I didn’t want to spend 500 € and I drove like this for half a year. The problem persists. Now another problem came up today. The engine “rasssss” or “knatters” during the ride very loudly. This noise does not go away even after a long drive. So I went back to the BMW workshop and they said I can’t go on. It could be the control chain or the chain tensioner defective. (truely. The engine didn’t have the full power either, but you could still drive. Inspections were all made but the engine unfortunately had very little oil. Since the workshops can tell me a lot and want to rip me off anyway, I ask for your opinion. Thank you very much.