starting problem

hi all,

my motorhome a toyota cressida (lol) has just developed a problem. When you turn the ignition it doesn't start. you get the click sound. I thought it was battery (always take two) so i swapped it out and out another in. A few starts later the same problem. Nearly called NRMA but being an IT bloke i know when a user has a problem you walk up to help and the problem is no longer there. So i had a think. went back to car and turned on headlights. They were fine. I then tried the ignition again and it started? The motorhome now has this problem consistently (every 2nd or third start) . I am not too worried and as i have found turn the key again (occasionally a few times) and it starts. (sometimes i put it in neutral and back to park and try again. (this may or may not be the fix, it may have started just because of multiple tries.), but i do drive to lots of remote areas, and in a weeks time i will be living permanently on the road.(a little bit worried one day it will just say NO)

It is an auto and yes it is in park when trying to start. The problem has only started happening since returning from sth coast, I did drive through 100 metre wide river (shallow crossing, nelligen) twice, whilst bush bashing looking for a lost gold mine.), i had it serviced a week before last trip.

Only other thing was in service got mechanic to remove on fuse as i was constantly getting a flat battery every 3 days. Yet the battery is FULL when trying to start. And it has not leaked since service.

Any ideas? starter motor? coil?

cheers in advance.......


peter