5-, 6-, 8- and 9-speed as well as 4HP20 automatic transmissions: ZF 5-, 6-, 8- and 9-speed as well as the ZF 4HP20 automatic transmissions are filled maintenance-free with specially developed partially synthetic ATF oils. Maintenance-free fills are intended for normal operating conditions. Especially driving at very high operating temperatures can result in accelerated aging or increased wear of ATF oils. In case of above-average operating conditions, such as: - frequent freeway driving in the upper speed range - offensive, sporty driving style - frequent trailer operation it is recommended to refresh (change) the oil of the automatic transmission every 100,000 km or no later than after 8 years. In each case, only released ATF oil may be used for oil changes. And oil changes must be performed in accordance with the relevant specifications. https://aftermarket.zf.com/remotemedia/lol-lubricants/lol-en/lol-te-ml-11-en.pdf Daca ai masina SH si a fost utilizata frecvent pe autostrada e clar ca a fost folosita la viteze mari si atunci producatorul cutiei recomanda schimbarea uleiului la ~100.000Km.