I think we've all been there...otherwise we wouldn't have found this forum
I had one of the last years of M59 Multispace that they made, acquired at three years old and that really was great, apart from regular servicing the only other item that caused me a problem in my eight years of ownership was a broken wire for the ABS system which I found after a lot of wiring checks. I reckon I would still have it now had someone not driven into the back of me on the motorway while I was in stationary traffic...
The B9 Berlingo Multispace that replaced it, was slightly older when I acquired it [eight years old but only had done approx 50000 miles] That proved to be a bit more troublesome over the eight years of ownership...
Items replaced, in no particular order over the period apart from normal service items and the cambelt/water pump replacement.
Both front shocks [had the horrible Citroen knock...and in my case wasn't any of the simple solutions but lateral movement in passenger side damper rod]
Top mounts [twice!]
Front springs [one snapped]
Rear springs [both snapped]
Gearbox driveshaft oil seal [passenger side]
Droplinks...it ate through these and I tried a number of different makes over the years [probably about five sets]
Starter motor [dreaded clicking syndrome]
New discs and pads all round
New screen washer pump [twice!]
ABS sensors [both front wheels]
New centre MFD [original one the temperature display disappeared]
Injector seals [leaking]
Rear lamp cluster connector burn up
Lower Ball joints
Front wheel bearing
And the last one was the numerous STOP/ABS warnings and random headlamps and wipers on [when engine not running!] which turned out to be a dead engine bay fuse box/circuit board.
Despite all those, I still found the Berlingo a great, practical vehicle that returned 50+ MPG over my ownership and at least the vast majority of stuff is fairly easy to source and replace. The M59 being a lighter vehicle used to return even better MPG.