Has anyone replaced their timing belt ? Our Scenic is in for a service/MOT, has done just over 52 k miles and is almost 6 years old (November 2001). Apparently after 6 years they "recommend" changing the timing belt (quoted £500) as if it goes wrong the cost of engine repairs would be over 2k . Has anyone had this done or not and then had the car go wrong afterwards. Is it a ruse to make regular money or a genuine maintenance issue?