they look like aftermarket rims, with BMW centre caps... they're similar to BMW Style 120 wheels off a 6 series, but not...
http://www.bmwstylewheels.com/bmw/120
if they're cheap aftermarket they will weigh a tonne, and probably have questionable centre bore and offsets. personally I'd ditch them and buy some genuine BMW wheels - 107s and 108s come up on here quite a lot.