Original sentence: Besides engine and interior, Alpina also optimizes the transmission and produces an button-shifter (called Switch-Tronic) on most cars, with paddle shifters used on the B4 S Edition 99.The production process switches between fine tuning the engine, delivering it to the BMW plant, marrying engine and body there, bringing it back to Alpina for interior upgrade with the Alpina's leathers, again all in a hand-made process that allows only limited production numbers.This has historic reasons, since Alpina was the first to mount shifting buttons on the steering wheel
Edited sentence: Besides engine and interior, Alpina also optimizes the transmission and produces an elegant button-shifter instead of paddle shifters.The production process switches between fine tuning the engine, delivering it to the BMW plant, marrying engine and body there, bringing it back to Alpina for interior upgrade with the Alpina's leathers, again all in a hand-made process that allows only very limited production numbers.The result are truly exclusive cars, very rare to find and very exquisite in style.This has historic reasons, since shifting on the steering wheel has been invented there