Hi, I have 2005 Grand Voyager 2.8CRD Automatic I have just done ATF Oil and filter change for regular maintenance been no problems in past, now gearbox it kicks at low speed, I believe problem related to part store providing wrong ATF I asked for ATF+4 but they provide ATF 4000 insisting this was new improved version of ATF+4, is this true? Plus just been to local garage see if possible for flush of old ATF basically said no and the gearbox is Mercedes Benz box so need to take car to Merc Garage is this true that 4th Gen 2.8 CRD have Merc Auto Gearbox? Has anyone experienced similar issues? Thanks:)