The turbodiesel W124s — OM603 (300D Turbo) and the final-year OM606 (E300 Diesel) — are revered for near-bulletproof durability and a distinctive idle sound owners describe as 'music.' A well-sorted turbodiesel is framed as more car than anything modern Mercedes sells, and low-mile OM606 E300s command strong money.
OM603 / OM606 diesels: 'built to last forever'
Mercedes-Benz W124 E-Class · mechanical