Hello, our S 350 W220 from 2005 with now only 34 TKM was yesterday at Mercedes for inspection. The spark plugs were exchanged (the master said every 4 years or 90 TKM must be changed).Prices: 26 ZE á 10 Euro = 260,00 Euro plus VAT! Spark plug 12 St. á 11,47 Euro = 137,59 Euro plus VAT Total: 397,59 Euro plus VAT = 473,13 Euro The fuel oil has been changed (must probably also be made every 4 years).Prices: 7 ZE á 10 Euro = 70,00 Euro plus VAT Fuel oil r 1 St. á 106,05 Euro plus VAT Small material 7,- EuroTotal: 183,04 Euro plus VAT = 218,82 Euro The air filter has also been renewed.Prices: 7 ZE á 8,70 Euro = 60,90 Euro plus VAT Filter insert 1 St. á 53,52 Euro plus VATTotal: 114,42 Euro plus VAT = 136,14 Euro These 3 positions seem to be particularly high! Are these prices normal?