I've not seen it happening too much which is why I started this thread. This doesn't seem to be at all like DRL rings burning out or anything like that.

I'm with you guys on the freak out factor on issues like this though. It never should happen, but I found this pretty early and quickly and am optimistic that it's fully resolved. If it persists I'll be working toward another type of resolution!

 

I've seen it happen, but no, it isn't very common at all. My 2017 D5 had a leaky windshield due to a manufacturing defect where there was no glue on part of the windshield This affected a large number of D5s. Water never leaked into the cabin on mine, but when we had to have the windshield replaced, the tech verified there was no glue on part of the windshield, but somehow all of the water drained out underneath the car.

 

Hi from South Africa - So I recently noticed a sloshing sound near the left (passenger as RHD) door and the dealer said it’s under the footwell and they heard about a problem with 90’s. I suggested a sunroof drain but he said they would need the car for 2 weeks to investigate properly…anymore with this problem? Mine is a 2023 110 D300

 

Hi. I have a 90 x dynamic 2022 model and experienced this issue over the holiday weekend. Dealer here says no team exists and not a massive issue. Any additional detail you could share would be greatly appreciated.

 

If it's a windshield seal issue that is worrisome in the quality control sense. Don't they submit every unit to a shower test at the factory? Could be the robots running out of the seal adhesive goo during the windshield install process. I also never understood from a design point of view why they need drains for the sun roof as I think other manufacturers like Mercedes don't have them, just like they also don't have those four access openings the big Range Rovers do at the roof corners. Those four plastic cover tabs on the roof are to me just more openings for rain to get in. Idk if the Defender has those but my L460 has them and the GLS63 doesn't, its roof is completely free of places for the rain to get in.

 

A little research found this to clear up your claims about Mercedes not having drains for their sunroofs:

Yes, Mercedes sunroofs have drain channels at their corners that are connected to drain tubes designed to carry water away from the vehicle's interior.Water enters through the sunroof's non-watertight seal and flows into a trough at the sunroof's edges, where it then drains through the tubes. These tubes typically run down the A-pillars and C-pillars and exit the vehicle's body, but they are prone to clogging from debris like leaves and dirt, which can lead to water leaking into the car.

Drains are essential for every sunroof. It is virtually impossible to keep water out of any vehicle, so means to divert water incursion must be provided to remedy this situation. Like thinking about a boat. Any hull is watertight when built until there are penetrations, such as the prop shaft, cooling water lines for the engine, transducers, depth Sounders, etc. Every penetration is a source for leaks, and no amount of sealant or gaskets will prevent water from entering the hull. That is why boats have bilges and bilge pumps. To remove the water once it gets in, which it will. Just as no weatherstripping on a door will keep water out, that’s why there are channels and weep holes in the bottom of every car door to allow any water to drain out. Without that provision, we would hear water sloshing on the bottom of every car door.

And with the advanced technology and robotics involved in car manufacturing today, I would highly doubt that the robots applying adhesive do not have a means to sense when the process needs to be interrupted to remedy a shortfall like ‘running out’ of adhesive.

 

I didn't know that but perhaps it's a different design as for me it has been trouble free for many years now. As for the boat hull comparison, not very fair as cars aren't boats and they don't stay on water all the time. We're talking rain....

For illustration purposes here are pics of my RR and GLS63 roofs. Very different designs as the RR has these openings covered by plastic tabs (4 total, two shown at arrows) - water WILL get in there, they're not a tight sealed fit, I can wiggle therm around with my fingers.



Range Rover L460 ⬆️



AMG GLS63 ⬆️

 

Mr L460 you’re killing me.

An education on how the water is managed up there:

Those 4 rectangles on your L460 are for roof rail attachment points. . https://accessories-instructions.lan...A/460/G3191634
You don’t have roof bars on your L460. So. If you want them, you remove those and put them there.

Your M-B on the other hand, does have the long roof rails. In the picture, I see them. 3 attachment points on each side They have to mount somewhere, and there are 3 holes in the Mercedes roof on each side where those bolt in. Similarly, on the L460, all those 4 things do is provide a point to mount a roof rail on. In no way are they letting water into the cabin. Just the same as those 6 holes in the Mercedes roof are not letting water in.

Then -- Those long black strips on either side of your L460 are removable that those 4 rectangles that trouble you are in are removable. The sunroof drain channels are in those areas...with drain tubes at the fore and aft ends. Underneath them. If you look at my post here it’s the exact same thing on the L663 Defender. https://landroverforums.com/forum/20...-110-x-120658/. It’s actually quite a good water management systems, that’s less prone to mucking up and clogging -- far better than old systems.

 

LOL... that proves how much of a newbie I am to Land Rovers. And evident as well when looking at the number of posts we both have.

I had no idea rails for the RR were even an option so that makes total sense. As far as the MB goes, those rails I believe (and I could be wrong again) aren't options on this trim, they just came with it. So... forgive me for my ignorance. That's why forums like this are invaluable. And excellent post on the L663 btw. I've been lurking around and participating here because I am thinking about getting a Defender 110 V8 to replace the MB as I don't need two 7-seaters.

 

My analogy with the boat is meant only to explain the differences between waterproof, watertight, and water-resistant. Few things are waterproof, everything else is watertight or water-resistant, with a rating. But anything not waterproof will eventually suffer moisture incursion, leaks or failures. Boats, even submarines are not waterproof because there are penetrations. The best built sunroof, with gaskets, sealant and weatherstripping will get some amount of water in, somewhere, sometime. Getting that water out is the goal. That’s why we see so many admonitions to keep sunroof drains clear, and YouTube videos demonstrating the procedures.