Hi there, new to the forum so hopefully I’m posting in right place…. I have a 1999 C43 Estate. Recently changed auto gearbox filter and fluid and O ring for electrical connector. Ever since gearbox has been in limp home mode. Unable to connect to any modules via the 32 pin connector. Have tried Autel & Snap on. Both work perfectly on other Mercs.Have checked and have power to pins 2 & 3 and a good earth on diagnostic socket. Any suggestions please?