Another Merc driver here, I just sit with my foot on the brake. If the lights annoy you then consider this:
“you are behind me because that is where you belong, if you are resentful then consider your own situation and try and make better of yourself, that anger that you are experiencing is just self loathing looking for an easy way out.”
oh and the myth about manual being faster than auto is just that, you can still change manually with an auto and its goes like as a buttered gerbil up a liberal MP