Blinking Gas Light and Check Engine Light
I noticed that the gas low light was blinking on my E320 2001 after my wife had filled up gas! I drove it for 2 days w/o knowing why and noticed that the Check Engine Light also had come on after day 1. Then I found on MBWorld that the possible cause was a loose gas lid. I noticed that the lid was indeed not fully secured and I turned it until it clicked.
But the "check engine light" still persists.
Thanks in advance!