Slk 172 doesn’t start anymore

Hello together, when I put my SLK in the garage yesterday he did not start after 5min! The ignition does not work! If I turn the key nothing happens! The amatures glow! The control lamps of the amatures do not work! I suspect the immobilizer! Battery I have checked iO. Second key used! Backups checked iO. I am stunned! Need your help! Thank you