Originally Posted by Legion5
5. The DCT is completely sealed from the factory and is never have it's fluid changed ever. You cannot even buy the special fluid and any BMW certified shops are forbidden from opening the DCT transmission.
It is engineered to last the life of the car with no maintenance whatsoever.
Who told you that? The fluid is Pentosin FFL-4 and is available. There is even a diy link on this site. Nobody believes that fluids in automotive applications are "lifetime" except the people that would otherwise have to pony up cash to pay for said fluids (BMW).
If you track your car it is definitely worth changing for peace of mind, and even if you don't it is probably a good idea.
link (thanks a ton to OP of the diy thread!): http://www.m3post.com/forums/showthr...3#post12720863