Break Fluid

Wonder if you all can help.

I had my car MOT'd last week and had to take 2 days off work (which i
can't afford time off)
Since i had it back i noticed brakes seem to go and when i press on
pedel again the brakes came back. So rather take another day off work
to take it back i will do it myself

Know nothing about cars i am guessing its brake fluid is gone.:redface:
Its a Renualt Espace 1992.
To top it up i am assuming its the cap right at back underneath water
cap.

Mr_Fin

Inspecting the brake fluid level of the master cylinder reservoir would be the first thing to check. If the reservoir is not completely empty, your master cylinder is leaking internally allowing your brake pedle to continue moving toward the floor.