w124 Estate interior rear lights !

[shootingbrake]

Please could anyone help in advising why and where water is coming from the bottom of the interior estate lights on both sides . Looked in my mirror to see a trickle of water coming out of the small internal lights and running down the interior trim on either side . I check regularly the drain points ! Are there any pipes in the roof of the estate to the rear of the sunroof ? Could the roof rack rails be causing the problem ? Thank you.

 

[trapperjohn]

Watching in interest for an answer. Never had this on any of my estates, will certainly be giving something a blast once the answer comes up.

 

[GP801]

The rear sunroof drains come down the c-pillar. Black rubber tubes that are pretty easy to see. Also the window seals for the boot side windows frequently fail.

 

[llewe]

Cracked /leaking rear washer pipe where it is in the roof??