I have a new radiator and ever since Ive had to refill the radiator with water every 2 or so months. Is this normal? I have been refilling it with just water (not coolant) so maybe I should put more coolant...

Also my washer fluid refill has starting displaying on the dash, but it is already full and it only appears every other other other time I start my car (weird). Is there anyway I can disconnect this critical feature as the sensor is probably bad?

Also does BMW or independent mechanics charge to turn off the SRS light?