clutches on these cars are mostly a killer as I break st170s, when owners are faced with a £800 ish bill for a clutch most walk away cutting their loses which is where I come in and dismantle them, and if any other issues like the IMRC and lambdas are playing up that also contributes towards a 170 getting scrapped, tyres is a personal choice but if you want safety stick with reputable brands but a lot of the choice comes down to how you drive it and the expected type of weather it will face regular