You either have a low battery or your terminals need cleaned
inside starter
inside starter.
inside starter.
Inside the distributor!
its inside the distributor
A bad starter
there is no relay for the starter. there is a solenoid (switch) and ignition switch. the solenoid is part of the starter (small cylindrical shape above starter housing. the solenoid has the battery and ignition connections). and the ignition switch is where the car-key goes. you need at least 8v from the ignition to the solenoid for the starter to operate. use a multimeter. otherwise check your starter - battery connections. otherwise replace the starter. otherwise, take off the starter and inspect inside the starter housing. if the starter is clicking but not turning the engine the starter teeth aren't engaging with the teeth on the flywheel. get a manual to the car here: http://www.germanautoparts.com/Books/Volkswagen
Inside the right of the engine compartment, near the battery.
If the battery is good and the starter is good, then you must have a wire disconnected somewhere.
the ignition module is in front of the lft front wheel,inside the fender. the module wiring harness runs thrue a hole /gromet in the fender into the engine compartment just in front of te ignition coil.
Needle nose plies or tweezers and praying -if not - replace the switch.
no it is not inside its on it