hi guys!
i have a 1980 280 se with a m110 engine.
it cold starts perfectly,but the electric fan turns on ,with the ac on "off"position...
after warm up, it won't restart that easily:i have to pump the gas pedal and to crank it up for a while...
from time to time,leaving from a signal light is hazardous: idle drops down ,and the car seems to be glued to the tar:sounds like i have lost half of my cylinders...
any idea?
i am looking for a drawing of the electrical wiring diagram,and or some copies of the workshop manual pages refering to fuel injection and ignition systems, because these are not available here(overseas):mbservice eyes only...
one more thing,i rebuilt the trasmission(auto),and it worked fine ,for a while,but now the car chirps the tires on1/2 gear changes, rather harschly... and i have to play with the gas pedal in order to make it more" comfortable"...
transmission fluid is mb and new,there were no debris,nor sludge in the pan,fluid does not smell burnt clutch discs?
what should i look for?
thank you.

There is a 100C fan switch on the right side(front) of the engine that could allow the fan to come on if the engine is that hot or the switch is bad.

OF course the ignition system should be checked out, spark plugs, wires, dist cap, & rotor. IF all of that system is in order then the fuel pressure should be checked. ALSO there are MANY vacuum hoses under the intake that cause running problems.

The transmission(modulator) requires vacuum from the engine to shift properly. That is the place to start as far as the FIRM shifting problem is concerned.

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thanks ,i will proceed in that order.
how much vacuum,at how many rpm should i have to begin with?