I'm stuck a long way away from my M3W at the moment, or any of the documentation and parts that I have for it but I'm pretty damn certain that it is a conventional right hand thread and that the apparent L beside the pinion is just two sides of a shallow square recess in the casting.
The couple of times that I undid the Torx Plus bolt before converting to the later style I found that it took all that my impact wrench would give to undo it and that was with the correct bit.
