So the oth­er­wise awe­some E75 has some bluetooth issues. It seems it doesn’t want to con­nect to car kits.

One solu­tion men­tioned on the for­ums is to delete a bunch of saved SMS mes­sages. It sounds silly, but for me at least it seems to have worked. I had some 2,000 mes­sages in my inbox plus 200 sent mes­sages. I deleted them all but the last 10 or so in the inbox and sud­denly my phone con­nects to my shiny new MEX BT2750!