C216 Multi-Contour Seat Leak

[Fluoxetine]

The massage function on the front seats of my recently purchased C216 isn't working due to a leak.

It's throwing "current / stored" codes saying "9306 Control unit DSP is switched off due to a fault" for both seats, as well as "9250 Pressure build-up not possible due to a leak for the Pneumatic pump for dynamic seat"...

Can anyone point me in the direction of a DIY repair guide?

 

[whitenemesis]

Remove the seat backs and check pipe connections. Check the connection under the seats.
STAR can test the system and help pinpoint where the leak is especially if it might be one of the bladders