Transfer Case Module Replacement

[umerkhn]

Hi all,
My first post on this forum. I have am 04 Cayenne Turbo. My transfer case switch hasn't been working for a long time. The other day the lights on the transfer case switch came on, i instantly put the CTT in neutral and turned on low reduction which came on right away.
The car now has low differential locked and would not switch back to normal driving. I drove very slowly to a close by Indy mechanic and after charging me $150 for diagnostics he told me it's the Transfer Case Control module that eeds to be replaced.
This is a pretty reputable mechanic shop they quoted me the part from Porsche Dealership and labor charge to replace it. I was able to find and order the part much cheaper on ebay.
I know the transfer case module is located under the front passenger seat. I took the front carpet cover but could not get to the control module because it had a plastic case covering it with no screws.
Can someone help me with pictures as to how to get to the module and replace it.
I looked everywhere online with no help.
Any help would be much appreciated.
Thanks
Umer