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First post here after a month of owning my new to me W221 (facelift).
I found a lot of water in the cabin which had messed up some actuators for the rear blowers.
I cleaned out all the drains I could find but I still have water entering the cabin after it goes through the front right sunroof drain. It seems to dump out at the bottom of the A-pillar (see video) and then just runs down the firewall and must be finding a way in. Is there meant to be a way of getting that water to go into the drain the for cowl at base of windscreen? Or is it meant to run down the firewall - if so, why / how is it entering the cabin?
at the base of the front windscreen the left and right corners have these ridiculous holes that block with leaf litter, the idea is these holes then pretend to direct most water to JUST ABOUT fall into a pair of incredible, usually 100% blocked with debris rectangular drain funnels that sit roughly an inch below at both ends of the trim panel. The idea was the water then runs down the inside on to the wheel arch liners and then the floor.... in the middle of the panel is usually a large puddle where a tiny grill blocked with more debris, allows nothing to ever pass. All in all they offer little hope in hell of letting the water reach the ground - and are quite unlike anything ever fitted to normal cars.- if lucky, you may even have half a rain forest germinating in there....
you can help the sunroof drains from blocking - by never opening the hideous rubbish. After all, the main goal is in reducing headroom by an inch, whilst introducing noise and 100kg of glass together with a significant weakening of the crash structure directly above your head
Glad this came up. 2 out of 3 drains blocked under my hood, when I just checked. I have no idea how my passenger compartment is dry. Ordered fish tape to clean it out.
the main goal is in reducing headroom by an inch, whilst introducing noise and 100kg of glass together with a significant weakening of the crash structure directly above your head .
No paint on the roof means no delaminating clearcoat on the roof. LOL
Thanks very much for the responses - I know how the system is meant to work but am keen to know if everyone else's drains the same way that mine is in the video?
Thanks very much for the responses - I know how the system is meant to work but am keen to know if everyone else's drains the same way that mine is in the video?
Thanks!
No, mine drains into the plastic mouth of the drain tube. Not sure why yours dumps short of that.
No, mine drains into the plastic mouth of the drain tube. Not sure why yours dumps short of that.
Thank you so much! Could I trouble you for a photo of how it works on yours? No need to pour water or anything, if you can just open the hood and take a pic, would be awesome!
nath_h how does your get in to the black funnel ? mine look like the video, there is nothing extra - does this mean idiots replacing the windscreen mess things up ? - photo appreciated
First post here after a month of owning my new to me W221 (facelift).
I found a lot of water in the cabin which had messed up some actuators for the rear blowers.
I cleaned out all the drains I could find but I still have water entering the cabin after it goes through the front right sunroof drain. It seems to dump out at the bottom of the A-pillar (see video) and then just runs down the firewall and must be finding a way in. Is there meant to be a way of getting that water to go into the drain the for cowl at base of windscreen? Or is it meant to run down the firewall - if so, why / how is it entering the cabin?
the original post is talking about water from the top roof panel that leaks passed the seals around the edges of the the glass sunroof panel / from the massive two part panoramic twin roof panels. This weeping by is normal on any sunroof, and they are built with drains underneath to direct the water away to the floor. These drains are usually small outlets in the corners, maybe with a small 5mm id pipe to which a tube fits and these run down the inside of the pillars.... over time these block with debris and the water can come in to the passenger area instead
part 600 and 610 though these look a bigger diameter as they only bothered with two ?
the original post is talking about water from the top roof panel that leaks passed the seals around the edges of the the glass sunroof panel / from the massive two part panoramic twin roof panels. This weeping by is normal on any sunroof, and they are built with drains underneath to direct the water away to the floor. These drains are usually small outlets in the corners, maybe with a small 5mm id pipe to which a tube fits and these run down the inside of the pillars.... over time these block with debris and the water can come in to the passenger area instead
part 600 and 610 though these look a bigger diameter as they only bothered with two ?
Ah, ok. I get it.
When this sort of happen to me I had to pull the wheel well. As my panoramic roof wouldn't even open and close. it would get stuck from all the dirt stuck in it, but now working like a champ. https://www.benzworld.org/threads/my.../post-18542326
Or do you suspect it's draining into the car from the pillar?
if we knew the length of part 600 we'd have a clue... I suspect it stops just after going on to the A pillar and then drains down the outside hidden in an open channel out of sight under the screen trim and dribbles out with NO chance of landing in the screen drain funnel
AKA hideous design to go with the rest of the set up - as in I suspect the first post video is entirely normal
the original post is talking about water from the top roof panel that leaks passed the seals around the edges of the the glass sunroof panel / from the massive two part panoramic twin roof panels. This weeping by is normal on any sunroof, and they are built with drains underneath to direct the water away to the floor. These drains are usually small outlets in the corners, maybe with a small 5mm id pipe to which a tube fits and these run down the inside of the pillars.... over time these block with debris and the water can come in to the passenger area instead
part 600 and 610 though these look a bigger diameter as they only bothered with two ?
Check the website/parts catalog where you found this diagram - does the quantity for parts 600 and 610 = 2?
Thank you so much! Could I trouble you for a photo of how it works on yours? No need to pour water or anything, if you can just open the hood and take a pic, would be awesome!
Here's how mine drains. It is a CL, so might be a little different. Looking at these drains have been well worth the effort...I got so much gunk out of the drains. Probably never had been done.
..... that's how rain on the screen is supposed to run off the screen and in the funnel thingies
the first post video has water (I guess) poured in the corners of the OPEN sunroof edges / channels.... it then runs down part 600 and dibbles past the little funnels as there "appears" to be no other way....
..... that's how rain on the screen is supposed to run off the screen and in the funnel thingies
the first post video has water (I guess) poured in the corners of the OPEN sunroof edges / channels.... it then runs down part 600 and dibbles past the little funnels as there "appears" to be no other way....
Unfortunately, the whole design is a little sketchy. I wish they would have designed something a little more foolproof.
when I swapped the starter battery the big black mounting plate stops you reaching and clearing out leaf litter, and then as it was winter it was all frozen anyway. I finally got off my **** and pulled it out and had a clean up yesterday - here all the leaf litter and crud on the left side that should not be able to get to this location but does coz the screen drains don't builds up unseen.... (my pictures are the left - battery side on UK cars - note this is what eventually makes the interior heater fan die as the water eventually rots through stuff and water seeping in destroys things)...
battery out, mounting plate out and you can see what's going on (now I know you have to wriggle that black bit of electrical detritus off the battery holder and move behind to reach all the filth - disconnect the rear battery for good measure)
Damn I wonder what mine looks like. My car was garaged by the PO. I garaged it for a short while and now it is outside again...also I live in an area that clogged the sunroof drains on a previous vehicle but I have had this car since late 2021 and have NOT noticed any leaks or related problems....I should inspect though.
I cleaned mine out yesterday. What a rat's nest! I continue to wonder how my car was not a fish tank, before I cleaned out all the various ports. @BOTUS , do you have any more ideas for easily neglected things to address w/ a 15 year old car?
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