On this one I can definitely say I've 'been there, done that'. You won't believe what causes this! If I had a dollar for every quart of water I've baled from the rear floor board of two different 240D's I could buy a brand new MB! And I don't think that's too much of an exageration.<br> <br> Here's how to fix it: Open the hood and look down below the hood hinges. There is drain there that is sort of a dimple where sheet metal is spot welded together. Also there is an opening under the vertical metal at the inboard edge of the hood hinge pocket. The water then drains inboard toward a hole where the wheel well metal joins the firewall. This is under the master cylinder on the drivers side and under the battery on the passenger side.<br> <br> I used a high tech tool to clean this out. This highly sophisticated tool was made from baling wire. For a city dweller, I'm quite sure that coat hanger wire would make a suitable substitute material.<br> <br> I know this sounds crazy, but after many years of frustration and hunting, I was given this information on www.mercedesshop.com and it worked. I have helped others with this information and it also worked for them.<br> <br> Good luck and keep clearing all those underhood drains until you correct this problem.<br> <br> Larry