#1 cylinder no compression

hi everyone looking for insight before i tear my car apart. was on my way to work and the car started stumbling check engine light came on pulled over car was stumbling bad. opened hood and heard a hissing noise tsss tssss ttssss not a solid hiss more like a loss of compression . immidiatly turned car off had it towed home pulled the plugs 160 across the board except 0 psi on #1? is this a problem any body knows about or had or heard of? please any insight thank you very much

Is the car stick or auto ? Any "money shifts" in it`s history ? Any unusual circumstances, noises, etc. prior to this incident ?

If you post this on the E39 Forum you`ll get a lot more responses than here. Good luck !