Another observation as I have the car parked on the lift. Looking in the upper grill near the center there are two black boxes about the size of a brick. I think I can see wires behind them so I was wondering if this is the air bag sensors. Just a few more questions.

 

The front impact sensors are small, so it's not them. Perhaps it's the air intakes? They're pretty chunky.

 

I'll see if I can get a picture . They are covered in black plastic and don't look like an air intake. They are just behind the upper grill and to the right and left of center.

 

adaptive cruise control?

 

We have a winner!

 

I don't have ACC but this may be the location for the unit. I wonder why they would be there blocking the radiator when you don't have the system.

 

OK just took a picture so hopefully you can see it. There are two of them , one on each side of the center of the grill.

 

Those are the engine oil coolers, some versions have 1 some have 2, maybe NA vs. Supercharged. My XKR has 2:

 

Here

 

oops, those I showed are the lower grill

 

I think the ones your showing are just bumper foam padding...

 

They are mounted on 2 aluminum brackets so I think they may be the supports for the ACC but not sure. Could it be the horns

 

No it is really bumper reinforcement. I know because I have dropped the bumper.

Mystery solved.

 

Ahhh, these puppies:

 

Yep that's them. Another lesson learned for me.