I have a 2005 380 and I need to turn the ignition key on and off for sometimes up to 10mins to start the car even with a brand new battery, anyone else have the same issues?

Are you finding that hte car simply will not crank or will crank and not start

I am seeing a lot of 380's with ignition switch issues, I find if you push in the key when you turn to start position will then crank

If is cranking then you may have an issue with the immob in the key, try your spare key, if you dont have one you really should look at getting one

agree with Madmagna. Sounds like a key issue. Maybe battery in the key is on the way out.

Yep definitely the Key

I found that you need to start the car with the second key every now and again for some reason as well but thats another thread I suppose

Lots of info on battery for key etc on other thread

http://www.aussiemagna.com/forums/showthread.php?t=94653