Hello,
I have downloaded UI Guidelines for CRM WebClient User Interface v1.4 (14-May-2008) from UI and Functionality - CRM - SCN Wiki
I have also found https://support.sap.com/content/dam/library/SAP%20Support%20Portal/support-programs-services/solution-manager/processes/…
v1.6 (27-April-2009) of this document.
And when I am searching of Google, I have found a v1.7 (13-August-2010) on scribd.com/doc/118439868/CRM-UI-Guidelines-V1-7#scribd
We are in 2015 and I suppose new versions of this document exist, where can I find it ?