I . have a classic 1984 Mercedes Benz 300sd turbo diesel. Recently, I started having problems with it cranking. Now, it turns over fine and tries to crank but doesn't. I replaced the glow plugs about 6 months ago. I have checked the relay and filters, everything seems fine. Anyone have advice?

 

I mean, the engine turns over fine, but it will not start. It's like a gas engine that seems to not be getting enough gas to the carburetor.

 

I see the primer, but how do you manually pump it as directed?

 

How do I pump the primer manually?

 

Ok. I followed the last direction and manually pumped the primer. But, it still will not start.