[lt13624]

Interesting.
Have you previously removed the spider traps from the ends of the hoses?
If not, then the blockage you mentioned could be due to the awkward to get at spider trap on the drivers side (if yours is a diesel) still being there.

Hi Niggly, I have removed all but one, the tricky one you mentioned which is really hard to remove as the AdBlue tank is in the way. I'm going to do this later when I have time to get the wheel arch lining removed. I tried for ages to get to it but it was too hard.

 

[lt13624]

Excellent write up - thankyou.

What did you use to squirt the hot water down the tubes?

Hi Greaout, you're welcome, hope it helps people. It's such a bad design. I wouldn't mind if VW did it at a service but they don't.

I used a washing up liquid bottle as you can squeeze direct into the tube.

 

[lt13624]

Not entirely VW's fault as they didn't design the panoramic roof (although they did choose to fit the design), it's made by a company called Inteva Panoramic Offerings

They must be aware that the design is not fit for purpose and could have helped customers fix, but refuse the acknowledge it so AFAIC, its VWs fault.

 

[lt13624]

I’ve got the 190ps diesel and I managed to get to it without removing the wheel arch lining or even jacking the car up. Are you sure you can’t get to it without doing all that?

How easy is it to pull the headliner down? Is there some trim or clips etc to remove? And any issues in refitting it?

It's pretty easy, a couple o

How easy is it to pull the headliner down? Is there some trim or clips etc to remove? And any issues in refitting it?

Hi Tubemonster, if you have one of those trim tools you can start to remove it from the rear with the boot open. Its fixed by 3 metal clips at the back and I am sure there are more further in but I didn't see them. The only thing to watch is to make sure you don't bend it too much and also when refitting, make sure that the plastic trim and rubber seals overlaps it.

 

[lt13624]

It is your opinion the design is not fit for purpose, and I'm sure all other owners who have had the drain tube blockage problem would agree with you, but the majority of owners have not had sunroof problems so as far as VW are concerned it is fit for purpose.

That's not to say the drain tubes don't require maintenance, and to be on the safe side it would seem to be preferable to clean them despite this not being a noted requirement by VW.

I covered 148k miles in my Tiguan without any sunroof problems at all as have many other owners.

I do sympathise with owners who have had water ingress in the car with the subsequent hassle of getting it sorted out, not a nice position to find yourself in.

Hi CNC, yes, agree and I reckon the majority of people have been lucky. I just get very frustrated at VWs attitude towards its customers when obvious problems arise.

 

[lt13624]

The video above would suggest that either there is a fracture in the plastic or that the channel supplying the drain outlet is filled with debris which is allowing the channel to flood and overflow.
Not an easy fix....

Sorry to see that M3stig, that does indeed look like damage to the plastic channel that goes from the sunroof to the joint/pipe.

I've got this issue and yet my drain holes are clear...