Easy to repair S80 3.2 and 2.5T

Hello dear Volvo community, in the near future, I intend to buy a newer car, and have considered the S80 3.2 or 2.5T next to the Mercedes W212. Basically, both engines seem to be quite solid, but I noticed that the engine spaces seem to be very tight and packed especially in the 3.2. My question, therefore, would be whether experience exists, how expensive repairs in and around the engine range can be for the two variants. In the case of the S80, sometimes the steering gears and the climate compressors have broken down. Does it make a difference which engine is installed and how complicated is the exchange then? Thanks so far and many greetings Robert