Lots of BMW fanboys here but – IMO the C43 is a much more refined experience, and with a few mods, more fun to drive. You got a great deal, congrats. I’ve got a Racechip tune in my 17 and in Sport+ mode w/ the PE open it’s a rocketship.
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Do you guys know if the new first payment incentive from Mercedes apply to the 2019 models or only 2020
Post pics please!
I’ll be looking at the Eurocharged tune once I reach my break-in mileage. Not enough reasons to drive now 
I’ve never done a tune under a lease. Any issues with warranty?
It only becomes an issue if you have an engine problem, aka you have to be ready to ‘pay to play’. Carbahn matches warranties, but the tunes cost a bit more money.
Most C43 tunes are piggy back style and consist of a T-harness and tuning module. Once the harness is installed you can remove the tuning module and the vehicle is back running in stock mode. I remove my racechip like this when going for warranty service.