Hi
The chassis number last 3 digits will indicate the position in any run...problem is BMW dont know or wont say what the run was
The Convertible register in the Car Club are compiling a list of motorsports to work out the run and looks like there is a different run dependent upon colour, S Grey, Macau Blue for your model and Mauri Blue and C Red for the last 50. First 40 were Macau Blue, next 250 N Silver and Macau Blue.
Email Convertible register on
Cabrio_e30@yahoo.co.uk
They also have other info and discounts on parts and suppliers etc
You will have to give them the last 7 digits but they keep it all confidential...when they have a run they will only tell you what position in the run you are..that will help for the future
Cheers