Hello, I drive a C1 from 2009 – HSN TSN: 3001 ACO. I bought the vehicle with 54,000 km in November 2019 and now 68,000 km on it. The previous owner has carried out an inspection perfectly every 15,000 km. The new car warranty no longer exists. How important is an inspection now? I changed the interior filter myself and would now only have engine oil + oil filter changed. TÜV got the C1 new in June. Is it really necessary Is it worth it? I am very grateful for your help – thank you very much!