Vehicles with a sunroof have drain hoses to allow water to drain outside.
Clogged drainpipes are best cleared with an old flexible speedometer roller. To do this, connect the roller to a probe about 230 cm long. You can connect the flexible roller to an electric drill with electronic control and "drill" the drainpipes at low speed.
The front water drain hoses are routed inside the A-pillar and exit above the lower hinge of the front door. A cleaning device is located in the hatch cutout.
The rear drain hoses run inside the rear pillar and exit above the shock absorber. The cleaning device is inserted into the lower end of the hose.