1987 300SDL, New brake lines,pads (all 4) frt rotors around a 1 1/2 year ago.
165,000mi on vehicle
In the last few weeks I've had to add brake fluid to my reservoir ( 3 different occasions) low fluid indicator warning light has come on.
Today I checked each brake caliper and line to see if they were wet.
They were not.

I also inspected the reservoir area for leakage but could not see or feel any wet spots.

Any ideas of were the brake fluid is going/leaking?