Whilst the roof panel is out you may want to check the drain
holes are clear. There are 4, one in each corner - the 2 at
the front are easily visible and can be cleared by feeding
a narrow tube into the hole. I think the front tubes are metal
by the way, so if these are leaking anywhere down this section
because they've corroded it's mega-bucks to fix.
The 2 at the rear are a bit more awkward to get to, but you
can see where they are in each corner if you sine a torch
into the roof. These tubes are rubber, and as well as the
tube blocking, it may be squashed between the roof lining
and the metalwork - causing water to flood out of the plastic
roof section under the liner and leak down the pillars to
the floor. On mine the rear tube was squashed on a cable clip!
1. Pull out the rear cabin light and feed it back through
the hole it sits in as you pull off the rear quarter lining
section (if there is a leak, the foam on the back of this
section will be SOAKING!).
2. Unscrew the handle in the roof and remove. I think the
roof lining is held in place by a combination of metal clips
and sticky black compound, so pull down the corner of the
roof lining just enough to allow access to the hose and the
securing clamp - be careful not to crease the roof lining
when you're pulling on it.
3. From here, I removed the clamp and removed the hose so
I could squeeze it gently back into shape with some soft grip
pliers. I fitted a new hose clamp as the standard one was
useless and carefully positioned the tube so that when the
roof lining is pushed back up it doesn't get constricted again.
4. Re-fit the handle and the quarter trim - it is worth leaving
this out for a bit to dry off if it is wet, and this will
also show if the leak is still present in a few days as it
will be wet again.
5. Pour some water into the roof and check that the water
comes out of the bottom of the car. The front drain holes
exit the bodywork just behind the mudflaps on each side, whilst
the rear holes exit just before the back wheels. With the
holes cleared you should be able to pour a considerable amount
of water down without any problems, but obviously start with