Cam belt replacement - age or mileage?

My Volkswagen Tiguan, owned from new, is almost five years old but has only covered 26,500 miles. Volkswagen say the cam belt should be replaced at five years or 100,000 miles but cannot tell me why the...

When should I change the cam belt on my car?

My SEAT Ateca has done 70,000 miles and is four and a half years old, when should the cam belt be changed?

When should you change the timing belt on a car?

When would you recommend replacing the timing belt on a car?

When should I replace the cam belt on my Skoda Yeti?

My Skoda Yeti had a cam belt and water pump changed five years ago at 48,000 miles. I haven't used the car much over the past two years, but at 78,000 miles (and five years later) my local garage is advising...