It would do you a world of good to be none. Jeans already have a little Diesel vibe (not a bad pair though, wouldn't shock me in a different outfit) but the jacket makes it over the top. You look like the kind of guy who wears leather bracelets that double as watches. Your MC fits are fine so why not avoid retro-eurotrash when you dress down? Harringtons look sorta stupid on me but I think with a look like that they'd be fine, they're certainly not a bold choice but they're both stylish and part of what i'd call "classic" men's dressing, which should be an attractive option for you. Hell I'd even like one of those classic cotton crewneck sweatshirts with that outfit.