As the former owner of a 1987 560SEL, it took me awhile to find the tranny dipstick. Try this: Open the hood, and stand dead center, so the hood ornament is directly above your head. Look down and to the left, about a foot from the firewall. You are looking for a red cover (about the size of a quarter) with a clamp that goes down one side of the dipstick tube. Lift the clamp, and wiggle the dipstick out. Be careful,as it's a few feet long and very easy to get away from you. This incidentally is also the transmission fluid filler neck.
Read my answer for the 1985 380se with the same problem.
Call the parts department of any Mercedes dealership and they should be able to email you a copy.
find the "hole" in the back of the seat. ... wait a sec.. read your manual.
To add coolant to and 1985 Mercedes 380se find the reservoir located in the engine bay next to the radiator. Make sure to use the proper mixture of coolant to water ratio and pour until the appropriate level. Overfilling can lead to sprouting a leak while the engine is running.
It is located at the front of the engine, on the right side underneath the power steering unit. This would be facing the car.
It is under the battery. It has a little red nipple on the top.
Assuming it is automatic, read the dipstick, probably Dextron III.
The same thing happened to my 1984 300SD. I removed the instrument cluster (speedo, tach, fuel guage, etc.). Using a hammer, I tapped firmly on the lock assembly while twisting the key in the tumbler.
Buy a Chilton's Manual for step-by-step instructions.
the dipstick is near the back of the engine compartment. Check while at running temp
6.5 quarts for a filter change.
There isn't one. There is a plug on the side of the transmission that you fill the trans. to. When you reach that level (and, of course, it starts spilling), you're full.