i added some to my a class.
i have also added heated to my clk but a retrofit kit and mounted the switches on the side under armrest. It seemed to expensive to find new seats and buttons, also i wanted to keep my air seats.
When i done my a class i bought all the seats with them in and buttons. All i had to do was buy the loom.
And change the airbag seats sensors over as the seats i had were newer then m old ones.
Best mod i ever done on both my cars.
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