Things to look for on MkIII trafic?

[Wookey]

I'm going to look at an X82 (i.e 2014-onwards, MkIII) Trafic (camper) to replace my now 25-year old trusty mechanical-age Peugeot Expert, which still works but is getting quite tired at 194,000 miles (and 215,000 for the engine IIRC).
I know nothing about Renault engines, except the thing about the scuttle panel leaking on the MkII vans and welding your injectors in place. I presume they've fixed that on the MKIIIs? But is there anything I should be checking before parting with quite a lot of money? It's a 2021 (26,000 miles) 2.0L example (but it seems there are 3 flavours of '2.0 dCi' engine. How do I tell which I'm getting?). Wikipedia tells me it's an M9R I4, but then it say the MkII has the same engine, and various online reviews say the engine is 'all new' for the MKIII version. Who's right?

Cheers for any pointers.