I think the Evaporator is worth mentioning. It's a matter of when it will start leaking, not if. There are very few cases with a W124 Evap not leaking. If you are one of them, you are one of the lucky ones.

Also, I would never put any of my loved ones in the rear facing seat of a W124 Kombi. Always put them in the passenger seats, the ones furthest from the front and the rear...