I've had a number of 104 and 119 in the 124 chassis and think there's not much difference between them maintenance wise. There's quite a few problems on the 104 that the 119 does not have, and not many the other way. More worry on the 119 chain but you just have to take care of it. I would not be scared of a 92 400E, perhaps a bit cobbed together versus the 93-95, also 92 EPA rating was lower, but no big deal. But when it comes to buying a car of that era there's really only one cardinal rule - avoid ASR.