R Class Expansion Valve Location

[Tim Wheeler]

I'm hoping to find someone who knows where I should start to replace my expansion valve on my 2008 R Class. I've managed to follow the Hi-Low Pressure lines through the inner fender wall and down under the floor beneath the Steering column.

Anyone know where I go to access the valve? Inside the car, under the car, in the dash?

I had someone replacing the fender and headlight unit and had them snap some pictures for me. The lines underneath are concealed under the cover panel.

[ILUVMILS]

Expansion valve failure is extremely rare on your R Class. Is it leaking or do you suspect internal failure???