Matjazz, if the bonnet isn't shut the wipers won't work and the microswitch on the lock often goes wrong to say the bonnet isn't shut when it is. To check, make sure that your bonnet is closed and try again. If that doesn't solve it, open the bonnet; on the drivers side next to the headlight there is a connector behind the grill; disconnect this and short the female connectors on the wires going to the cockpit, close the bonnet and try again; if all works, the switch needs replacing (you can keep the short as a temporary fix), but if not, put together again.