AFAIK, the only way to make a 450 a manual is to find a 350 manual and use its gearbox. But nothing is impossible. I shouldn't say "the only way". I can imagine that with the right money and engineering expertese of pros that there may be many manual transmissions suitable but with signficant mods including the adaptor housing and connections to allow it to be slotted in. Obviously the most sought after conversion would be to find something that would be as close to a drop in replacement as possible with little modification. Who knows what might be out there. In the end though it might be easier to do a whole engine and tranny swap from something else that may not even be MB. Thought that would defeat the purpose of a manual 450.
Apparently the kangaroo was still on the side of the road rotting away but I forgot to go see how big it was. It was a big one and luckily Cam didn't hit on the half volley otherwise it would have come back and wrecked the windshield, a-pillar and roof.
Nathan, as far as where it came from, it was owned by a Uni student in Canberra, or someone in Canberra, then onto selfor50 who only had it for four days before this happened. If it wasn't a manual it would've been dispensed with I reckon. But I don't know its origins and I'd love to know. I'm not at home right now but the oel cooler is the same setup as the red 280s. However, the red 280S has the Aus compliance plate and radiator support options code plate. This manual one has no options code plate or aus compliance plate on the firewall. From memory, the chassis code was 116 020 60, or 116 024 60 I can't remember what 60 means but I think it's to do with RH manual and one of those numbers means it's german made. Although I can't remember which, the plate says "Made in Germany"