My dear friends , how long have you bought your porsche car? are there anything trouble? it's bored to me, once the car get ill,so expensive to repair it.even more there are quiet little repair place. sometimes i want to repair it by myself but do not get tools. my friend,how do you solve your car problem?are there some good tools under recommended?how about this Porsche PIWIS Tester KTS520 V28.some one used it?Any information will be gratefully received.