I went on a hard drive last night, blatting thru tight country roads (British country roads, aka just wide enough for a W124). Anyway, this resulted in a heck of a lot of heavy braking. When i was cruising home to let the car cool down, i noticed the brake light was flickering slightly when i depressed the pedal. Very dimly, but flickering. This morning going down the motorway, the light was dimly on even when not braking. It also comes on when going up steep hills. I had new pads installed about 3,000 mile ago, so i dont think its that, although I use the brakes really heavily.
Could it be fluid? How do I check the fluid level acurately? Probably time for a fluid flush anyway (its light brown)
Thanks for any advice on what this light is on for!