Check to see whether the liquid collecting in the car is antifreeze or water don t taste it.
I have a leak in my car roof.
Another pretty big clue will be if your roof is completely rusted over.
Having a leak in the roof of your car can cause damage when it rains will damage your upholstery as well as trickle water into electrical circuits fortunately repairing roof damage is relatively easy and will save a lot of money in getting it repaired professionally especially if your car is out of warranty.
They re equipped with drainage tubes that carry excess water from the roof down and then off your vehicle.
The drain tube holes are usually located underneath the sunroof itself.
However if you can see any bubbling or cracks in the paint along the sides that s where your leak is.
Once you have determined that the leak is caused by a roof related issue measure the location of the leak in the living space from two fixed points.
In fact the roof is built to leak albeit in a controlled fashion.
If you spot any rust near the roof sand it clean it with rubbing alcohol and maybe even use some touch up paint on top.