Help! Interior Rear Light Switch?

[Benzy13]

Hello...I just washed and vacuumed my 1992 300se and the rear center light on ceiling is on...Never noticed there even was one...There is no switch...It is smooth all around the fixture..The front ceiling light has a switch....I even found 1 rear little light fixture in each passenger side in back that I never realized were there...they have on/off switches! Why is there no switch? Where would it be? My battery will be drained by morning!!!!! I have been up and down 75 steps trying to find a switch that is not there! I opened and closed doors and tried everything! I do not have a book and anyway, I bet this isn't even in it. Does anybody have a clue? Thanks for hearing my frustration...
Angie

 

[television]

Here is the circuit diagram and all on the right, you have a switch in the rear for this lamp

http://www.autolib.diakom.ru/CAR/Mercedes-Benz/1993/300SE/SYSTEM WIRING DIAGRAMS/4600.pdf

 

[stwat]

The switch is on the dash next to the speedo/rev counter pod.

 

[kth286]

yes it is on dash of my 124 coupe.