03'55AMG

Recently I was trying to see if holding down 3-5-7 would give me more settings, which did not work. so Thinking I got it wrong, I tried 1-5-9 and the screen now reads 'download' while in the service menu.. thats all there is to it so far, no difference in anything, and it usually goes away with 1 or 2 key cycles. anyone else get this?