E46 convertible with water in your trunk. Welcome to the BMW Plug. As it turns out, it has very little to do with your trunk and a lot to do with your top. As it ages, the top liner, the tier 8s and the just clogs, two drain plugs in the convertible boot. And they're infinite wisdom. BMW decided to put the drain plugs under a big thick steel plate. And there's only three ways to unclog them. First and the other prefer way is to remove the top. That seems very hard. Very fiddly. Second way is to try to snake to the drain and unplug it. I try to. Then it works. The third way and as the one that we're going to use, it's chemical. So you open this. Pour a little bit in it. About a cup or so. And let it do its magic. Give it a good rinse with clean water. And we're done.