Ok got it looked at by the local Benz shop...He first adjusted the mixture to the exact place where it should be...He drove it around but ended up not being exact as to where the problem lies.

He put on the notes:
-Test engine found fuel mix to rich
-Adjust fuel mix found kick down
-Cable strut clean and lube cable
-Found rust at Fuel Distributor
-Possible rust inside gas tank

He said in his professional opinion, I should just leave the car alone as it drives fine...it's just the idle that is irratic. But honestly I'm not driving a car that shakes this hard when I pull up to every light.

So you guys think that I should find a nice looking used fuel distributor and replace that first? As for the gas tank, my dad said he can take it into his work and get all the rust off for relatively cheap.

One thing he did while the car was running though...He unscrewed the screws to the Fuel Injectors a little and fluid came out (I am assuming thats the gasoline? Sorry noob)...why did he loosen them? He also was spraying brake cleaner all around the injector lines (I am assuming to check for leaks correct?)

He also said using Costco gas makes the engine rust so use Chevron...I know this isn't the problem...but just wanted to see what you guys also think about that.

I wonder if I will ever be able to get this fixed...

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2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k