Not seen this before!! Only had the car for about a month, this happened this morning?

Started the car this morning it was dark 07:15 so lights came on I also put heated seat on. I left it running on drive while I opened gates took my jacket of etc. Got in reversed out stopped got out closed gated got back in drove off I then noticed that the SatNav screen was pulsating light/dark….. light/dark….. and so on I switched to the main menu screen same thing?? I switched it all off in fear I was about to blow a fuse and all the electrics! Curiosity got the better of me few minutes later so I switched it all back on while still driving to work and all was ok the screen had stopped pulsating and although it seemed a little dark (I put this down to the lights being on and it must have been in night mode) no pulsating??

Any idea’s….. Cheers Laurence.

I had this the other night,started the rrs up dash lit up like a xmas tree,sat nav flashing wouldnt change out of 2nd gear,looked around and the kids and mrs had the heated seats on.I would think its battery related getting low,i took mine out for a good run in the day no heaters on or lights and it seems to have done the trick. 2007 HSE in black with 22 inch id ones with privacy glass.
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Mine used to do this at dusk..............must be a sensor somewhere that decides bright or not so.

Never did it at any other time (which was nice!)  L322 Big Daddy SUPERCHARGED 5.0 Autobiography - Here & Now!

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Mine does this every so often as well. I think the sensor that controls the brightness must get confused every so often...