RE: a 1984 123 sedan. I attempted to pressure bleed the brakes on this car with a Snap-on hand pump style bleeder. The device attaches to a common "screw-on" metal cap with a male adapter which screws onto the plastic reservoir neck. For some reason, the black metal cap isn't screwing on to the plastic neck correctly. It only turns two or three rotations (consistent with a wrong thread pitch match). I know that 1981 and prior model years had a different thread pitch. I thought that anything post 1982 was all the same universal thread. I believe it's a M45 x 3.50, standard for ATE brake reservoirs (even up to model year 1992!). After applying 15 p.s.i. of fluid pressure, the fluid began to hiss out the side. I rescrewed the cap onto the neck four times, still the same. Does anyone know if the reservoirs are different in 1982/1983/1984/1985 model years???