Which part of the car qualifies?
My 1990 SEC (W126) has about 215,000 miles on the odometer. Correct, as far as I can tell.
However, the M119 engine's got about 80,000 miles on it as the old M117 engine blew the head gasket at cylinder #8 at about 197,000 miles.
The 722.370 transmission has about 40,000 miles on it and God knows how many miles on the used 2.82 differential.
Seat are original, the sound system isn't. The radiator is new (custom, Ron Davies Racing), the AMG kit consists of parts taken off a 1984 Euro SE and NOS parts from Renntech. The bumpers are used Series 1 ('79 - '85) Euro. The front and rear windows are new, the side windows are original.
It gets kind of complicated after a while.
1990 SEC, Arctic White w/gray interior, M119.960 326 Hp. engine from 1992 500 SL, 722.370 transmission from 500E (reinforced clutches), 2:82 Differential, Euro Headlamps, 1st Gear Start module, One-Touch Window module and Keyless Entry module all from BergWerks, Bilstein HD Shocks on front axle, H&R lowering springs front and rear, AMG 3-piece 17" rims, 8.5" in the front and 10" at the rear.