Re W124, in all seriousness, I reckon upgrading to a modern ECU and associated loom would allow you to bin a load of potential annoyances, so whilst the windows might be have a mind of their own it'll start and run fine. If you really wanted to go to town then a modern PDU (with, based on BQ's post, a vacuum pump and reservoir) could net you modern reliability with classic style - as long as the suspension and so forth is not buggered.
But that's probably 4 to 5 grand, so you'd need to really like the car.
Re W124, in all seriousness, I reckon upgrading to a modern ECU and associated loom would allow you to bin a load of potential annoyances, so whilst the windows might be have a mind of their own it'll start and run fine. If you really wanted to go to town then a modern PDU (with, based on BQ's post, a vacuum pump and reservoir) could net you modern reliability with classic style - as long as the suspension and so forth is not buggered.
But that's probably 4 to 5 grand, so you'd need to really like the car.