All the old guy had to say was
" excuse me sir, but would you be so kind as to turn down your music please while we are refuelling, it would be most appreciated"
kinda like when asking for supplies in a tiger with a blown turret or engine.
And i'm sure there would have been no problem.
Except that the last time the old guy tried that some kid told him to go f*** himself.
Or another possibility is you could have turned down your music when the old guy drove up, and not forced him to have to say anything.