Dumb Question
 

they say if you don't ask, you'll never know. so my dumb question for today is, where can i find out where my break fluid goes on my 1986 300sdl.

Look inside the engine compartment and find the big round object directly in front of brake pedal inside the car... this should be your power brake diaphram...
Somewhere on it.. or attached to it with tubes will be a container (typically white translucent)with a cap on it... this should have some lines on the side indicating high and low marks....
Do you have a digital camera ?

Check your manual, it shows you. Their are no dumb questions.

the only dumb question is the one you didnt ask!!