unable to reset an overdue service/check
 

Hello everybody. We own an Italian registered 2011 mini one convertible. We hope you don't mind lesser miniS in your forum. Specs are very similar to a cooper although power rates at only 96 hp. We've been unable to reset a check because we kept driving beyond the intended mileage (km in our case). When we try the reset procedure it won't work. Currently it shows -90 km. Is there an app or other diy tool we can try before taking it to the dealer? Many thanx