How do I get my gas water heater to light?

-It's a Bosch 13P instant gas water heater. It's being phased out, so the Bosch website was completely useless.



The pilot light has gone out. I know which buttons to press - when I press the gas one, I can hear the gas flowing, but the other one doesn't seem to be sparking, so I can't get the pilot to light at all.



Anyone else had this problem and know what to do?It is wore out get a new gas heater.