Seat Leon Owner's Manual page 118

Control lamp
lights up Possible cause
Windscreen wiper fluid level

too low
Several warning and control lamps should light up for a few seconds when
the ignition is switched on, signalling that the function is being verified.
They will switch off after a few seconds.
CAUTION
Failure to heed the control lamps and text messages when they appear may
result in faults in the vehicle.
Safety First
Solution
Top up the windscreen wiper
reservoir as soon as possible
⇒ p age 121.
Operating instructions

Practical Tips
Lights and visibility
Technical specifications
117