Here's my take on the W126's, stick only with the 1981-1985 300SD's. If you get into the gassers with the V8's, they need more maintenece and require more expensive parts to keep running. Also the 560SEL's are going to be very expensive to repair, because they have all the extra goodies that can break... I once looked at a 560SEL that was $4500, and it would have cost about another $4500 to "fix it up"...