7:40 Just a little hint. The coolant is sinking "sucking" into the cooling system by vacuum. This is necessary, that the cooling system is deaerated. Otherwise, good video for mechanics.
In Europe!, when the timing belt reaches 90,000, it must be replaced. In other countries, it cannot be replaced until the timing belt is disconnected. It depends on how much you drive.
I have an a180d and dealership mercedes said that the toothed belt its to be changed in 200,000 km or 10years. I am concerd because it seems to me to much. This is for ECE countries 200,000km or 10 years. What is your opinion !? Thanks