The gearchange cables on the Matiz are a common cause of poor gearchange and a 'notchy' feel to the gearlever. These cables run from the base of the gearlever to the gearbox and have a rubber bush or 'eye' at one end. it is usually this bush that wears and causes the problem, but the bush is not available separately, so the cable assembly must be changed. Much cheaper than a gearbox though!!
Lee
April 2009