Hello everyone. Thanks again in advance for the advice.

I own a 1983 Mercedes 300sd. The car is very slow in acceleration and can barely make it up hills. It will only start if I do full throttle. Once started it purrs like a kitten.

I have tuned the valves twice. Each time, I admit, I use the crank bolt. I know now to use the lower bolt. I have cleaned and replaced the injectors with new nozzles. I have also cleaned the fuel tank strainer. I have run the car with a makeshift gas tank to rule out the filters.

I have enclosed this youtube video. https://www.youtube.com/watch?v=zE4tfZgp9PI

The video shows that I have taken off the ALDA to rule it out. I am throttling the vehicle to show that the RPMS are slow at the beginning. This is how the car runs. It is slow as molasses and then gets more speed as the turbo kicks in. The video also shows the waste gate. I have taken its vacuum tubes off while running and can not feel any vacuum. The car idles like a dream. I am certain it is not the throttle linkage. Thanks for the help….Goldveg

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1985 W126 300sd