Called the dealer, the name for these pads are "shims" as per the benz parts department.
They said they have four different heights for the front ones and three different height for the rear ones.
price is $5.25 each for the front and 4.something each for the rear. Not bad at all.
My question now remains,
is this an easy DIY or would I need to go to the mech. to have them replaced ?

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Whether you think you can or cannot, Either way you're right!. by Henry Ford.