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Mercedes-Benz 300TE Questions

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Where can i find a diagram of the engine
On the chassis is there a lift pump in the tank?
Don't know were the fuse box is at
I checked the doors but there was no sticker on either of them....
I did manage to find the curb weight, but cannot find the gross weights anywhere??
Odometer/trip counter has stopped, speedo works.
The horn also stopped working at the same time. I've had the elect harness and fuse box changed in the past, but elec problems seem to happen periodically.
It seems like it isn't going to start then when I put my foot down on the throttle it eventually fires. Mostly happens when it is warm.
This problem happens once it is warm
When I jump pin 1 and 2 I ghet excellent flow fuel into a
small container for good 30 seconds...
then I install MAS relay (which has fuel pump relay inside)
and only get trickle for 2 seconds...tried used spare....flows good for only 3 seconds....
is it possible both MAS relays defective.......or isthere other possible electrical vudu thing going on ???
TX
it has a strong cranking ut still wont turn over is there a reset switch or a fuse for the fuel i hear the pump running but it wont turn over first time this has ever happened
Recently changed fuel pump, plugs, wires, distributor cap and checked coil resistance: .8 ohms primary
8,300 ohms secondary cold. Seems ok.
Any suggestions where to go from here ??
sputter is random...started about 2 weeks ago i notice more obvious when go from stop to cruise speed...once cruise about 60/70 mph its better....replaced fuel pump located under chassis right side rear passenger area about 6 months ago, plugs, distributor rotor/cap...running excellent...recent sputter getting worse as time passes...TX
fan doe's not work on high speed or auto speed,only on low speed.
fan doe's not work on high speed or auto speed,only on low speed.
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