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Hola, was looking at citroen C5 with 1.6 HDI engine, as cheap road tax and insurance compared to the 2l. https://pmmonline.co.uk/technical/tackling-turbo-trouble-psa-1-6-hdi-engine/ as the turbo does seem to be an issue. Cit/pug specify a different oil spec compared to the ford/mazda not sure about the mini. There is a filter mesh in the turbo oil line that should be cleaned and or replaced regularly. If that filter clogs, the turbo gets oil starved.
If the turbo is a variable vain one, check that the vain move, google how. Some of the electrics suffer from dry solder joint fails, the inner turbo vains do stick but the vanes can be freed off with mr muscle oven cleaner to remove the carbon build up and get the vanes moving. This is common on way to fix variable vane turbos.
The filter should all be purflux (as they are cheap from GSF) and there is a lift pump issue on the some of the ford and c5 that the lift pump in the fuel tank breaks up and sends little metal fragments in to the main pump and then it dies.
Always to get a better price and or longer warranty, that will cover the turbo/egr/fuel pump stuff.
EDIT: Remembered that a friend on another forum got berlingo for the same reason as you, check the seams on the boot/rear passenger seat spot welded join can rust if water is allowed to settle there. Especially if the rear area has been washed out regularly.
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lynx
@edmundro
Thanks for the tips, @lynx I’ll give you a bell if I need ya. Watching egr valve vids on YouTube to know what to look for ta :)
My pa is 40yr veteran of the car trade so been schooled by him as well.
It’s not like they aren’t common as muck so can just walk away if it’s no bueno.