I've had the car 1 year, only 31k though it's 2018. The garage gave it a full service & mot'd it and asked if the plugs had been changed (recom 72k or 72 months old). I'm pretty sure they haven't. The fuel smell wasn't apparent before they had it in which makes me suspicious even though the plugs may well need changed... they quoted me £208 to supply and fit which seems high to me.