I must be missing something. The family piles into the very nice Infinit XJ with a special ornament, and the little girl is worried that they won’t make it on time. Grandpa says not to worry, they’ll make it in time for the great tradition.
They arrive at a house (not a little cabin) in the woods and place the ornament on a string of lights. A finger flips a switch and all of the trees around the house light up in a way that denotes the work of a hundred union workers on overtime. Cue Christmas music and warm smiles.
So what was the tradition? Why the hurry? They go to someone’s expensive mountain house, hang a solitary ornament and light up the forest???
This is a very pro-union thread. Congratulations.
The house belongs to a wealthy uncle who will write them all out of his will if they don’t arrive at his mountain compound with an ornament for mandatory Holiday Cheer.
I have not seen the commercial, however I’ll comment anyway.
Their piece of the puzzle is important, or the forest won’t light up. Like in Griswold? They need the Infiniti to make it on time and not screw up the forest lighting.
Maybe? 
I took it to be a longstanding tradition to add a new ornament each year by a certain date and time, added by the youngest member of the family. Either that, or the child who puts the last ornament on the tree is the younger man’s first-born son, and he will be sacrificed to the Forest Gods to ensure 20 more years of prosperity. The younger man is the Grandpa’s second son; his firstborn was the second sacrifice, the Grandpa’s older brother was the first. Either interpretation makes as much sense to me.
I read it as a family going to spend the holidays at a friend’s mountain home. And that the moral of the story is that children are impatient little shits who act as though a two hour ride is an interminable sacrifice. Thankfully, the Infiniti will get you there quickly and safely and you can get on with the true purpose of the trip. Swinging!
The implied message of the lit forest is that the child will be standing outside admiring the handiwork when a bear will happen by and eat her. Grandpa was always a little unsure of the paternity of that child anyway.
The way I understood it, they had a tradition of hanging a new ornament every year. They weren’t worried about not getting there in time; they were worried about not getting there at all, but the trusty [advertised brand of car] got them through.
The problem is in the execution. The final shot was supposed to show us that they’d been doing this for many, many years. But the producer and/or director of the spot put so many damned lights up, I can only assume this family tradition started with the birth of Jesus.
I prefer the one where the elderly parents sneak out of the house and steal their son’s car. “He’ll be fine.” Greedy old car-stealing bastards!