I am in the process of purchasing either a W126 Mercedes 420SEL or a W140 S320 sedan. This would be my 3rd Mercedes. I love the older W126 models because they are virtually indestructible, and have less electronics of potentially breaking down. The W126 in question is a 1987 420SEL with 150K miles on it. I love the huge back seats of the 420SEL, and I especially love solid door thump; a definate tank on wheels. My second choice, a 1997 S320 with 135K miles, is an absolute beauty. The infamouse "princess Di mobile", a work of art in every way. I don't know which one to get as I have been reading reviews about the S320 and most of them are positive, but then I come accross some people who tell me to stay away- From electronics nightmares, to transmission issues, to the pnematic door closing assist, to the brake pads wearing down every few months...I have been reading about these issues. The W126 obviously doesnt have all the newer features so wouldnt be prone to these breakdowns. Is there an S class owner who has had both the W126 and the W140 and who would recommend one over the other? Any suggestions or questions would be appreciated. Keep in mind that the service history of both cars I will probably not be able to get, so I don't know if the timing chains have been replaced, etc. My first choice is to get the W140, but I dont want to be at the repair shop every week with constant problems. Any suggestions?