Out of interest, what were the electrical problems with the 124s/129s and 201s?I'm not so sure that the older ones were much more reliable than the newer ones; I remember quite a few problems with 124s 129s and 201s. Mostly electrical from memory - at least the engines and transmissions were mostly bombproof. If my only criteria was reliability I would have had only Lexus or Toyotas - quite astonishing cars in terms of build quality and reliability.
I remember the wiring loom issues that affected some engines on later model 124s, but generally the 190s and 124s I owned were trouble free electronics wise.
Conversely I must have owned/worked on at least a dozen 190s, many with engines that required surgery to some degree - generally cylinder head gaskets and/or top end work on the 16-valve models at 100k plus miles.
Agreed on Lexus and Toyota reliability in general though.