The decision had been taken to abandon the "Standard" name because it carried mundane undertones, in German as in English, which the company felt were increasingly out of keeping with the advancing automobile technology and the growing optimism of the age now that, finally, the economic backwash from the 1929 crash was beginning to recede and growth was returning both to the German auto-market[2] and to the economy more generally.

For 1935 the Diplomat received new bodywork which now featured a bulging (and more streamlined) front grill and more shapely wings over the wheels.

[4] By 1938 the "Limousine" and "Cabriolet"-bodied Diplomats could also be purchased with bodies from Karmann of Osnabrück: these closely resembled the style and character of the Ambi-Budd-bodied cars.

[6] The Diplomat's six-cylinder engine was a 2916 cc straight-six side-valve unit for which a maximum power output of 60 PS (44 kW; 59 hp) was claimed.

The Adler Diplomat was no longer offered for sale in 1939, although records show that a few cars were built on 1939 and in 1940, presumably for military use or export.