https://beefytools.com/p1246-mercedes-the-supply-voltage-to-the-sensors-is-outside-the-valid-range-p1247-p1248/
P1246 Mercedes The supply voltage to the sensors is outside the valid range P1247 P1248 - Mercedes...
https://www.agrocotrailers.co.uk/product-page/ifor-williams-ramp-guide-p1302
Ifor Williams Ramp Guide - P1247 | Agroco Trailers
Similar to P1228 but with no back stop.
ifor williamsrampguidetrailers