Neither does he!

Seems like the linearity vs. non-linearity is a consequence of parameters attributable to the physical and mechanical dimensioning of any particular engineering exercise more than any say electrical characteristic, I wouls suspect that MB fuel level transducers are more linear in their output as most are gesigned and implimented in a vertical sliding configuration rather than a pivoted cantilevered configuration of many other transducers. Many MB's particularly the 80's vintage have their fuel tanks positioned in the vertical plane behind the rear seat as a saftey precaution as the core area of the space frame is less likely to be impacted than other areas. It's hard not to appreciate that attention to saftey engineering compared to say the Corvair, the Pinto, or the GM pick side rail fuel tank fiascos.