KE has its issues, but compared to LH and Motronic they are wonderfully simple. Are you looking to add to your fleet?
I had an early 140 s500 and that had a totally shot engine loome. I dont imagine any will be immune completely, best to check each specific example.
Malcolm, im supprised what you say about economy, I found it the other way around, the 119 much thirstier than the 113 (not the one with the shot loome, that doesnt count!)