The accelerator should be pretty smooth. The MINI has a drive by wire throttle so there is no throttle cable linked directly to the accelerator. The only thing that provides feedback is most likely a spring in the pedal. Check and make sure something isn't in the path of the pedal and bring it up with MINI if you can't find anything.
I think i remeber reading somthing similiar... there might be gunk stick behind the acceleator pedal... (*you'll get your hands dirty if you touch it*) reach behind there and you'll feel that there's a rod going from the pedal into the firewall... see if thats clean if not clean it with like silicon spray or somthing...
The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.
AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.