Yngmar, by the side of your companionway are a couple of vents. I have the same boat but no vents [engine room?] Geoff
They're original as far as I can tell, and ventilate the engine room, which doesn't have much other ventilation going on, except perhaps through the bilges. Mine was built in 2000 and launched in 2001 - Bavaria seemed to often do minor changes during a model lifespan (and some custom options, e.g. the removable inner forestay was listed as such in the original order sheet).
How is your engine room supplied with air?
(https://sdfjkl.org/tmp/varnish_after.jpg)
I guess that it goes via the bilges. It has not been a problem as far as I know. Built in 2001. Geoff
FWIW, my 2001 aft-cockpit model of the same boat has engine-room vents by the companionway - just longitudinal as the companionway design is a bit different in AC-model.
My B34 - 2000 build has the same engine vents in companion way but I have seen several other with and without these vents. Seems as said before, Bavaria varied the spec. As an aside, my vents were a pain as rain water leaving the hatch scuppers ran over them and despite the louvre, was entrained into the engine compartment. Had to modify to stop this.