phenomic

I have an 08 ml350 and i am having intermittent headlight issues. I get different messages through the command system. My right parking lamp and left turning lamp trigger quite a bit and sometimes they dont work but they will begin working as well. I dont think the bulbs are loose. Idk where there might be a loose ground either.

I was going to change the bulbs themselves but they usually work so I want to avoid it if possible. Anything else to try/am i missing anything?