Does the pitch of the noise changes as you turn the steering wheel? Then I believe it is your Power Steering pump and very common problem for first generation Minis. If not, i think it is your cooling fan somehow running very loud.
electric fan
Most probably the noise is piston slap, this noise is heard when the engine is cold and disappears when the engine is hot. if the slap is very strong when the engine is cold and the noise becomes less when hot but still the noise can be heard.
We need to know what kind of a noise it is in order to tell you if it is a strange noise...
The noise you are hearing is the engine running. If you have not started it yet,then it may be an animal eating your hoses and wiring.
I have a 2004 c230 and I had a squeaking noise when the engine first started. It was my water pump with uneven wear on the water pump pulley that was causing the sound. I will tell you it could be many different things, but this was my reason.
i dont know but would like to know!!!
Serious engine knock or valve train noise. Have this looked into by a pro.
The engine is probably damaged. Put oil in it. If noise is still present, you will need to take it for repair/replacement.
Servicing required.....
Noise. Without noise, it can't work. Noise is in an engine, and without it does not work. Every engine has to make some kind of noise, internal or external, inside or outside the engine.
belt
it does that because it has a generator which makes the engine makes these sounds