From several tjhreads I've read, 300Es can be little money pits compared to W126s. A/C repairs, the B2 piston (??) in the automatic transmission, etc, etc.

The 1990 SEL will be very well sorted. The Six won't have the torque of a V8, but it's a pretty good engine. Ask one of the 300E experts who reside around here about head gasket issues, etc.

-Sam