First go to this site
http://skinnerbox.steaky.org/123_DISK2/program/123-cd-index.html
Go to job number 05-210
This is the Mercedes service manual for the 300D (617 engine). You car is a 240D (616 engine) the valve clearance requirements for your 616 engine are
Intake cold 0.10mm at 20degrees C
Intake hot 0.15mm at 60degrees C
Exhaust cold 0.30mm at 20 degrees C
Exhaust hot 0.35mm at 60 degrees C
Your intake vs exhaust valves are the same as 1-4 cylinders in the diagram for the 617 engine. Just ignore the #5 cylinder in the diagram.
You don't have to use the Mercedes wrenches. Some folks are successful with regular wrenches.
You cannot rotate the engine by pushing the car in gear with an automatic.
You can use the power steering pump bolt but go slowly. Dont' put a lot of force on the unit. rotate slowly and allow the compressed air to enter and exit the cylinders. Or remove your glow plugs.
If your on the drivers side of the car and you put a wrench on the power steering bolt you will pull it towards you.
Look at the fan blades and make them move in the right direction.
Go to the site above and read about your car. Remember you have the 616 engine and the site is for a 617 engine.
When your making a title for your post. Be more specific about your needs. I would have made the title
"Info for a valve adjustment on a 616"
or
"Questions on how to adjust valves on a 1983 240D"
Get more specific and it allows the members to focus on posts that they can help you with. Otherwise we may just skip your post.
Dave
PS
Always include the car, engine and any specifics about your vehicle. Ie-1983 240D AC system
If you had your Email on your post I would have sent you the 240D job 05-210 ( pdf format) for the 616 engine.