Pressure on Lex should be tried but I suspect that they will say that the remedy is for Mercedes to hurry up with their trailed "fleet" solution. As no doubt members of the BVRLA they are more likely to maintain the Association's stated policy.
Thanks for the responses. Will try Lex but suspect you're right and it needs MB to release a new fleet friendly version of connect me. Does MB have any option to get feedback through this forum?