2015 BMW 335i — conservative tune feels great — what should I log?

I'd keep this practical. Verify the cheap/easy branch on the 2015 BMW 335i before a big repair or a big spend. I'd do that before spending real money. Verbal 'we'll take care of it' is not a plan. I've seen both outcomes, which is why I'd test instead of assume. Doing the boring step first on purpose.

Write down what you already tried. A second data point from another 2015 BMW 335i owner helps more than a generic diagnosis. I'd do that before spending real money. Not gospel, but it saved me a headache. If this is nothing, great. I want that in data.

Following up on conservative tune feels great — what should: still happening, but I have better notes now. I'm in no rush to be a hero on it.

Owner notes beat generic advice here. On the 2015 BMW 335i in North Jersey, I'd fix the thing you'll notice every day before chasing spec-sheet extras. Then you'll know the next fork. On “conservative tune feels great — what should,” that was the fork that mattered for me. If it doesn't change the out-the-door or the repair estimate, it's noise. I'd rather look cautious in this thread than stuck later.