I bet Albert has this issue in his vault
However, there's not the 131 compared to his rival cars in his issue; the "Vergleichstest" is between BMW528i, Citroen CX GTi, Ford Granada 2.8i, Mercedes 280E and Opel Senator 3.0E. I bet the Mercedes wins
(We Germans call this periodical "Mercedes, Motor&Sport" instead of its original name "Auto, Motor&Sport" for some reason...)
For the 131, the headline says "Fiat 131 Sport - Test". Good enough
Have a look at the drawing of the Mercedes S Class to be presented in 1979 - far from what the car really looked like when hown to the public!