i would never own a shitbox german car, but i think the only car that i see on the road that i would not modify would be the new mercedes CLS. i couldnt afford to void the warranty too haha. tint, sound system, basics like that dont count as modifying in my book, because they are absolute requirements. though knowing how much i love the sound of a v8, especially twin turbo v8, id probably put cutouts on it, but i think id stop there.
but then id see modified ones like this, and have to do wheels, etc:
I think it is the best looking car on the market right. not the most elegant or beautiful, but the best. just appeals to me so much.