Originally Posted by tarnbarn

Hi there,
The 508 you're looking at will have an OM314 fitted. It's a 4 cyl diesel. Depending on the exact spec it has DIN output of 80hp, SAE output of 88hp. Torque is 266Nm (23 kpm) at a limited maximum rpm of 2800. These are light truck engines good for a zillion million thousand kilometers at scary speeds of up to 90/100 kph (downhill).
Also fitted to some 70s farm machinery and boats (in Europe anyway).
HTH
Giles