I`ve only had mine a month,93K but it look`s like every thing is original, Auto box, IRD, VCU, rear diff.
I`ve just finished the service items and some small niggly faults. This is what i`ve done to it so far.
1. Engine oil and filter
2. IRD oil
3. Auto box oil (ongoing now on 2nd flush may go for 3rd)
4. Rear diff oil
5. rear diff pinion oil seal (was leaking)
6. Improved BMW crank case breather
7. Air filter
8. Cleaned hoovered pollen filter

9. Front passanger door locking module replaced.
10. Repair to brake light switch (still working

)
11. Repaired tailgate piston/mechanism
12. Repaired tailgate window de-mister
I think thats it, to be 100% the air con needs gassing, and I might change the Aux belts, but other than that shes runs fine. But has kept me busy this last month.