If you need to do fixes to your Keeway Cooper then it will always be a good idea to have a Workshop Manual to use as a reference just in case you want to know the way to remove a particular part for example, the Exhaust and install it again successfully.
Keeway Cooper Workshop Manuals offers you particular diagnostic info on your car therefore if something is playing up it will help you identify what the issue is and the best way to resolve it. Then you are able to assess if this can be done on your own or in case the job is just too big you could make a reservation for your Cooper in with a decent mechanic.
Keeway Cooper manual