Hello together, I bought a touran with a normal 1.6 l. It is built in 2005 and has a mileage of 99,500 km. The car was not waiting in general. Except for the oil has not changed so far in the last years. Therefore I think about changing the timing belt. We want to drive the car if possible still good 5 years. A service booklet is not available. When should I really let the belt change? And how do I control it? The belt is disguised. If the test shows no cracks, can I then drive on calmly? Thank you. Greetings