Does anyone know what this is? I found it under the battery tray when I took it out to route some cables. It looks familiar but can't recall where I might have seen it. It has an MB part No. of A 000 541 00 63 but didn't show up on any of the searches I did. It's hollow with what appears to be a tube connection spigot on it, and measures about 2" x 1.25" x 0.5"
It might have something to do with the butchers who replaced my windscreen a while back since they also broke my cowl molding! I thought at first it was a terminal cover, as I also found the red +ve cover under there too.