Focus Rubbling at low speed

HILFE Focus Ruckeln at low speed Hello together, got the tip with the forum from a known. Seems to give some competent people here. Unfortunately, I don’t belong to it. My problem: My FocusI Bj 99 1.8l jerks, if I only give gas slightly, or let it run downhill in the stand gas. DAs is particularly bad in damp weather. Besides, the part goes off regularly while stopping. I was already in different car dealerships, but so far with little success: ZΓΌnd I just don’t want to change stuff all the time, which doesn’t matter. (The car dealerships are trying to keep a table open!) Would be great if someone could help me here. PLEASE PLEASE. Otherwise, no problem,except wear parts. Up to now 125 Tsd km. Unfortunately, I need a complete set of summer tyres per season, although I don’t drive as bad as before πŸ™‚ It’s probably on the chassis. 17. and approx. 27Tsd km a year. But otherwise 100% satisfied! Such a ST or RS would appeal to me, but the keeping costs?! Maybe I should save on a boxster? πŸ™‚ Please for help with how many km has to be changed timing belts? 120 or 150 Tsd km? I am divided with the car dealership because