They do offer one for the 535 ...
Engine conversion (additional ECU)
for 535i (based on 225 kW / 306 hp /
engine N55B30 Twin Scroll Turbo)
266 kW (392 hp) / 5660 rpm 480 Nm (lb-ft 354) / 2950 rpm
I notice your in my area, you could be among the few that actually have their work done at Hartge they are off of the A8 just past Saarlouis.
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2014 550i M-sport
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