I suggested this idea to, I think, ab4444 a while ago in this thread.
Have done it before, and it works a treat, the proviso being only use as a last resort, having being reasonable and polite first, as it tends to get the dealer's back up.
Got me a result and a call from the dealer pretty much immediately, having previously being repeatedly fobbed off.
We ended on good terms, but I wouldn't ever go back there.
When will dealers ever learn- treat your customers well, and they will come back.
Exactly. I would exhaust all other avenues first