When I see complaints like this, I wonder if this is the way people feel about my generation when they call us all the “Me” generation. I lump the rock impact complaint with the person who was complaining about their lift struts on the lexus, in that they complain to much, and expect way to much. My impression, in my best feigned exasperated voice “Oh lordy, MY dealership wouldn’t replace MY radiator because they don’t care about ME, MY feelings, or MY wallet. Why don’t they care about ME, isn’t that what I pay them for?!?”
No actually, you paid for a car, not to be treated like a Prince(ss). Now you are paying for something else called “Insurance”, but you’ve stated you aren’t going to see them, just to help all us little people out out… but naturally, its ok to screw Nissan, the private dealer, their workers, other customers, share holders, etc?
As for protecting your precious radiator, I looked at the M35, and all the pictures I could find of them look like they do have grillage in front of the radiators, both top and bottom. So what else do you want? Those large vents are there for a reason and if you block them off to much to stop every rock, leaf, bug, pebble, pollen, etc., you lose any benefit you gain from them. They have these big air intakes for engine cooling, brake cooling, redirecting air under and around the car for efficiency, stability at speed, reduced buffeting, maybe even downforce (on your nissan?). So sure, take a piece of cardboard, spray paint it black (or gold, to match your crown), and tape it in there. That will stop the pebbles. But does the dealership owe you anything. Not really, but I can imagine they’re trying their best not to roll their eyes at you, at least while you can still see them. So perhaps it isn’t “God forbid you have to deal with Nissan for warrenty repairs” but rather “God bless Nissan for dealing with people like this, and still having the energy to put out a good product.”