As can be seen from table 1 above, by the end of the war the Mercedes D-III was putting out 220 hp. This model, however, came so late that it is doubtful whether it saw any action. 

The ü stands for uberverdichtete or high compression. This is quite a difference from the 160 hp output of the baseline design. This 160 hp Mercedes designation was used, in the case of the Fokker D-VII records, to show which engine was in the plane. However, at that stage of the war, 160 hp was not what the engine was producing. The dates shown above are when the changes were initiated not only for current production engines, but also in the field, retro-fitting on older engines. Records show that older 160 hp motors were brought back to repair depos or torn apart in the field and, after the new pistons were added, were producing 200 hp. Janes authoritative publications confirmed this when on June 6, 1918 a Fokker D-VII was brought down behind allied lines and the engine was tested and shown to make 200 hp. In fact, in one instance the same motor was used in three different aircraft. The impact this could have on the FITS aircraft stats comes through the Albatros D-V and D-Va, which were retro-fitted due to their vast produced and their need for better performance. The change that is missing in the game is the Mercedes D-IIIaü. 1,500 domed pistons per month became available in March of 1918 for retro-fitting to older Mercedes D-IIIs and IIIas in addition to brand new production engines⁴.  Thus roughly 250 Mercedes-equipped aircraft per month were upgraded to produce 200 hp. Table 2 below shows the chances of obtaining the 200 hp Mercedes when a player rolls up the Albatros D-V/Va in March of 1918 or later. It also shows the chance of obtaining the 200 hp Mercedes when the Fokker D-VII 160hp Mercedes is rolled. The change in aircraft stats follow this table: