G Class the agony of choice

Hello, I want to get a G as a new car soon, but I’m not sure yet what kind of a car… it’s also supposed to be a purchase, not a leasing. I have the choice between the new G500 and the “old” G500 as a special edition, alternatively the G350. My driving profile is rather short distance from customer to customer, everything <10km. 1x per week also ~50km. Year about 20Tkm. We also have a 2t caravan, so far our VW-T5 pulls, but the G should do it in the future. In the "land" I actually hardly go When I go on holiday to the beach or worse dirt roads, that shouldn't be a problem with anyone. We don't have to talk about consumption, that's clear to me. When I look at the used car, I only see the 350, which makes me doubt the quality, but which could also be due to the fact that the G500 is sold less often. How reliable is the G350? I would prefer a petroler out of my belly, but is it still true in today's market? When I compare the petrol engines with each other, it is mainly the consumption that speaks for the new one and the selectable chassis that I find annoying, the start/stop automatic...For the old one, the interior speaks with the AMG steering wheel (well in hand), the bumper and the larger cylinder capacity with hopefully greater reliability and longer lifespan.What do you think about it? PS: a rational car would be a small car....but I don't always want to be reasonable:-P