I'll second Brian's reply. Even wear on tires does not necessarily indicate that everything is 'a-okay'. There could also be structural problems within the tires, especially the sidewall that may not show up, visually, for awhile.

This behavior is definately not normal for a W126 - my 560SEL is one of the most stable cars I've driven.

jlc

__________________
Jeff

'87 560SEL 267K (177K on motor) Blue/Blue
'98 Buick LeSebre 60K (wife's car)
'56 Imperial Sedan 124K
Past Cars:
'67 Dodge Monaco 130K (Sold)
'87 Chrysler 5th Ave 245K and going strong (sold)
'73 Plymouth Satillite 175K (sold)
'96 Chrysler LHS 80K (totaled)