The auto trans is electronically tied into the PCM, just part of the Mercedes security system. You will need to overcome this, as well as the mechanical tie-in.

HDDP put a SRT6 engine into a 6-speed car. I think you will have the same problems that he did.

You might want to send him a PM or e-mail. Here's a link to his profile page....

https://www.crossfireforum.org/forum/members/hddp.html