I'm not sure its the M46 but I do know the shifter (in picture) is not the original shifter. As it was explained to me when I purchased the ride was that you can shift through 4th and then have to push the green button on the dash to shift into 5th. I thought that made it the M46, but I am no expert. The green button is an obvious add-on, maybe not the best way to add-on, but meh~ details-schmetails, lol.
But sadly, I never got the pleasure of shifting into any gear.
Regardless, it does need a lot of love and I'd rather see the vehicle go to someone who appreciates it. In fact, I am almost willing to give the car away to a person as such. You just gotta come tow it.