Owners overwhelmingly treat the M119 5.0L V8 as effectively indestructible with proper maintenance, citing multiple examples well past 200k-300k miles and a documented forum car over 625,000 miles. The consensus is that mileage should not scare buyers away, and that accessories fail long before the drivetrain does.
M119 V8 longevity and high-mileage reliability
Mercedes-Benz 500E / E500 (W124) · mechanical