Got an 850 no-turbo, 170,000 miles, and a problem with missing brake fluid. This started a couple weeks ago when the brake light came on. Sure enough, the master cylinder reservoir was low. Topped it off, didn't think alot about it, and went on my merry way. 'Lo and behold, the beast was thirsty again later in the week. And after feeding it (3) times, something is truly wrong. No leaks under the car, brakes all work fine. Where's the fluid going? In the booster?
If that's the case, does anybody know where, or if, I can get rebuild seals for that cylinder? Or do I just bite the bullet and get a new cylinder? Or could it be something else?
Thanks.

T.......take both the front wheels off and look at the brake lines, and the connectors on the calipers and follow the lines to where they bolt to main supply. If All connectors are dry as the lines, take the left wheel off and look at the main "t" connection that splits the brake lines to the rear calipers and check the connectors on those calipers as well. If all is dry everywhere, PARK the thing at the DEALER!