W123, Factory Books and Manuals

The Glow plugs won't kick on.

I have a mint '82 4-speed with 120k actual miles (3k mile oil changes since new) that has a heavy metallic knock at idle (all cylinders) and less power than it should (max speed 80 mph). Items I've done: new injectors, valves carefully adjusted, compression check (330~360 psi all), new filters (all), 2 cans diesel purge...all with no effect on noise and low power. I'm thinking perhaps injection timing might be the problem but know nothing about how to check/adjust. Also, the car does not smoke much and has excellent emissions numbers. Any thoughts? Thanks so much for your input! Kurt

I have an old 300td, and untill reacently have not really had much problems with the Brake system. I have had vacuum problems befor leading to Shifting and Locking Problems, and I fear that a NEW vacuum problem is now causing problems with my brakes.

I recently bought a 1978 240D so I could run biodiesel. I heard all the warnings, so when it started to get slugish I changed both fuel filters. It runs much better now, and has more power, but when I turn off the ignition the engine won't stop running - even after I remove the key. I tried reducing the idle speed with the key-shaped knob on the dash, but that wasn't enough. Does anybody know if there's a way to change the idle speed under the hood, and how to get to it? Adam