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I am in the process of retrofitting C63 sport seats in my C230 (W203). You can read about it here:

I have some of it figured out, but I’m stumped about how to connect the seat bolster and lumbar support controls. The moderator on the W203 board suggested that the lumbar and bolster in the C63 are powered by the PSE pump in the trunk and the controls just open and close valves. I cannot find how the tubes connect to the seats. If anyone has a C63 with sports seats, would you please post a picture showing the connection for the pneumatic system?

Thanks in advance.
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