Could anyone tell me if it is possible for someone with the appropriate diagnostic equipment to disable the seatbelt warning (or at least the audible warning) on a 2006 W164 ML?
I don't know if this will help, but my Vito is a 2007 (similar era, so may operate a similar software platform etc).?
I had removed my double front passenger seat unit, when giving my van a deep clean. I unplugged the seat sensor cable to do so.
That would have been fine, however I switched the ignition on whilst the the seat was unplugged, so the SRS warning light lit, and would not go out.
I fairly extensively researched, (as I like to be able to do all tasks on my vehicles myself) but came to the conclusion that there was no viable option available to me to re-set this SRS warning light myself.
Eventually I took my van to a Mercedes Indy', who plugged it into their computer & switched the circuit off.
Annoyingly they didn't do what I had asked them to, (which was just re-set the SRS warning light), so now the "fasten seatbelt" warning no longer activates.
That had alerted perfectly accurately before I paid them to reset my SRS warning light.!
Hth.