He’s full of shit. Full Stop
I’ve bought 3 new M3’s - two F80’s and a G80 - and there’s nothing done at the break in service that adds power. It’s an oil and diff fluid change, that’s it
Find a new dealer/sales person who know what they’re talking about
Imagine thinking your already in-tatters reputation will be helped by screeching “i ShOUldn’T hAVe To pAY fAIr WaGES!!!” in a courtroom