[UPDATE: It's not a Ferrari!]

[UPDATE: It's not American. Or a McLaren]

[UPDATE: It's not an Audi R8, a Lamborghini, or an Aston Martin.]

[UPDATE: It's not a Toyota. I gave you another hint]

I modified the picture to make it "easier"

HINT: It's German, and they don't make them anymore.

HINT: Here's another picture, from the same area of the car, which is the rear:

HINT: And another picture:

I won't stop the hints until someone gets it right!