Engine 2,295-cc DOHC 16-valve inline-4, cast-iron cylinder block, alloy head.
Net power 185 hp @ 5,300 rpm
Net torque 200 lb-ft @ 2500-4800rpm
Compression ratio 8.8:1
Fuel requirement Premium unleaded, 91 pump octane.
Fuel and ignition systems ME 2.1 sequential multipoint fuel injection and ignition with antiknock control. Electronic throttle.
(Data directly from the Mercedes USA site for the 1999 C230K which has the M111.975 engine)