Until now switching the ESP off has required a G1 Trust plug which on a G2 sadly kills the ABS as well.
The Roadster has a ESP button to 'numb' the traction control while retaining the ABS, the Roadster and the G2 Fortwo are both controlled by a SAM unit so we set about finding the wiring to retro fit the switch.
After tracing the switch on a Roadster wiring loom and finally found the relevant wires to tap into, After mounting the switch neatly in the under stereo draw it all looks pretty tidy.
This mod will only work on G2's (698cc versions)
The wiring can be found here.