Hello and Welcome - My name is XXXXX XXXXX Im happy to help you..You mention, when you turn the key - no click, nothing... but the radio works etc..In that case - if you have the usual warn lights that come on, on the dash when you switch on - then check the immobiliser system LED - that should be flashing at a constant rate when the key is off - car locked / or left... When you switch On - dash lights etc on as above - the LED should go out - If when you attempt to start it - that LED flashes rapidly - then you have an immobiler problem - then try another key - in case you have a key issue. If its not that - but you have the LED as you say, then the "car side" of things - not the key, has the problem - and as its electronic - other than your finding any wiring issues etc - via a visual check, the system would need plug on diag equipment to find / cure that fault.If its not as above - ie, the LED is ok - then you need to double check the condition of the battery -- bear in mind that the radio, lights , horn etc etc can work fine when a battery is low - but the starter motor takes a LOT more power to operate it , than those other systems - so double check that - try a jump start etc to eliminate / or find that as the problem.If its not the battery - the starter motor , or wiring / connections to it are suspect and that would be the next to check - you will need to check the wires etc - and check for power to the starter motor - on the small lead, when key is on the start position. If you have voltage but no start - the starter is suspect as having failed.So those are the ways forward on this - let me know how you go. You could have a starter motor inhibitor switch fault too... try holding the key in the start position - and brakes on - run the auto lever back and forth through the range - if the starter kicks in - thats the usual fault then.Best Rgds, MIKE.Let me know if you need anything more on this at all - Please do click on the OK rating to Excellent ratings service for me now, Thank you for that... and you can get back to me anytime if you need / wish.. Best Rgds, MIKE. Please note, you are rating the content of my "answer" - my help to you - not the "system" which can experience delays etc which are not under my personal control -or delays caused by "time -off" which we all have on occasion - Thank you.