Sometimes starter doesnt engage on start-up...safety feature??

[98Boxster98]

Here's a thread from www.renntech.org explaining how to replace the ignition switch:

ignition switch replacement

It helps to be flexible. I did it laying on my back with my feet on the driver seat (which wasn't so easy for me since I'm not all that flexible.) I also removed the air ducts as shown in the thread (not a big deal.) A small screwdriver definitely makes the job possible.