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Update:
Installed JB+. No issues. Just follow the directions and it's a 10 min job including waiting the 5-7 min for the ECU to go to sleep.
I turned on my sport display yesterday and floored it and it pegged out at 240hp and 300lb/ft torque
Today, my sport display showed 300hp and approx the same torque. Easiest way to check this is for someone with a stock 530e to turn on their sport display and floor it and see if it'll peg to 240/300 like mine was doing pre tune.
At any rate, I'm very satisfied and can feel a difference!
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