Ten13:

I apologize for being slightly misleading! I mentioned the manual 5-speed transmission as your car is the gasoline powered dual cam straight six-cylinder engine, where mine is a non-turbo five-cylinder diesel. The manual transmission in my car is a four-speed manual like the 240 D. Your top speed is much higher than the 95 mph maximum of the diesel.

Retrofitting with the clutch pedal and cables was easy. The only modification required was the driveshaft (which is shorter than the sedan). The item is only available outside of the US, so a sedan driveshaft was shortened and balanced for this project. I had the manual transmission conversion accomplished in 2002.

The post about the 12,500 mile valve adjustment was spot on. This is a job you can do yourself (with specialized wrenches for access) on a cold engine. When the valves are newly adjusted, you will hear "valve clatter" that is a subtle "clicking" that sounds like it is coming through the center vents in the dash.

Jim
'78 300 CD