So for those of you that thought I was joking...
This morning I fitted said dumper tyres to the rear of the s124, along with 2 of the orignal steel wheels on the front. I then used the car for most of the afternoon with a smug grin on my face, as it will go where everybody else cant.
We had around 4 to 5 inches of snow here today, causing most people to get stuck on the hills around here and abandon their cars at the side of the road. I just drove round the lot of them and cruised up the hills without an issue.
I dont think I'd want to take it faster than 45mph though, as the handling was getting a little "intresting" after that speed!
I'll post some pics tomorrow, but for today I'm going to call it a win.