I don't know if I need the 69040, 69760, which has an 80 address decoder, or another. Also which mfx sound decoder has the correct turbo diesel sound on it.
Thank's in advance.

Thank you HO! It is an item no. 3374 216 with a Delta decoder, but I want the turbo-diesel sound on it of a 218 if I'm going to bother. I know it doesn't have the correct exhaust stacks, and I don't care. I just love the turbo sound. My br 212 has no turbo sound. I wonder if the 60941 motor upgrade set will fit. There are some still available. It depends on the motorshield, and commutator gear size. I can do this for hlaf the cost of a new br 218. My dealer can load the 216 diesel sound on the new 21 pin mfx decoder for 5 dollars.

Many thank's HO!

Yes Bigdadddy, and Guy at AJCKids also. Had I seen it yesterday before asking, the numbers of the compatible parts he lists if your Loco has them, the kit should work.
It's an easy enough conversion, aside from the red pick-up shoe wire being spliced with a black wire with heat shrink tube to the Delta decoder, from the factory, as I bought this brand new, and no violet wire. The lights are the plug in socket type insulated from the frame.
I'm still contemplating the upgrade though. It doesn't have marker lights. That would entail changing the sockets or using Led's. Still not difficult. The other thing is the missing elbow exhaust stacks. They do look nice on a br 218.