Anyone use Metz 54MZ4 in AUTO mode only with KM5D?

I think I got an older version 3302 'foot', so TTL does not seem to work at all (everything goes white, due to extrem overexposure, every time)

However, took a few shots around the house in AUTO mode, and it seems to give me pretty nice exposure. Straight ahead flash sometimes seem a bit overexposed, bounce seems very nice. Have not played with diffuser at all.

Since I plan on using it mostly for simple snapshots indoors, usually of my baby running around Do you think this is sufficient?

Is anyone sticking with AUTO only anyway? I understand it doesn't use preflash (unlike TTL?), so maybe this is reason good enough?

Thanks!

-Tom