Has Mercedes Always Been This Bad?

dave docwra:
^^^^^^^

Was it an electrical brake issue?

No it was a cab mounting problem that set up a very bad vibration. It happened without prior warning, fortunately within yards of a MSA slip road. The driver (40 years experience on artics) had his wits about him and got it into the MSA. We’ve had cab mountings wear on older CFs, but never on an XF no matter how old. We do know the reason, which was definitely a totally unexpected and unprecedented occurrence and not something the regular driver had caused.