That is the same issue and same mechanisms as my W209 CLK, thanks for the explanations, I already broke one clip now I know it is OK to break them all!
Great video! Sadly this didn't work for me. For anybody else watching: if there is no blockage and you've confirmed the hose by itself still squirts... Then the heating portion of the jet may have failed, which will stop it squirting altogether. I picked up a brand new jet from Mercedes for £50, but saw many aftermarket options for under £20 on eBay. I managed to break every single clip too!
What is the power cables that is plugged into them? Mine has both them cables unplugged from the sprayers but theres no cables coming from the grill into the car, only the wash hose! Thanks.