In June of 2005 about 40,000 Märklin enthusiasts traveled again to Göppingen for the Modellbahn Treff. That year a perfect anniversary was celebrated at the foot of the Hohenstaufen with the 5th event of this kind for fans of railroading Unique for this occasion was the historic E 69 that came to Göppingen as part of a special trip. Interested attendees of the model railroad meet show could view this ancestor of electric locomotives for low-frequency single-phase alternating current up close. The 37478 locomotive with one each type Bi-29 standard design branch line coach, item no. 43136, and one each type Pwi standard design branch line mail car, item no. 43151 made up a souvenir for this Modellbahn Treff anniversary. This special train for a particular era had the train destination signs "Sonderfahrt Nördlingen - Göppingen" on the sides of the cars. The prototype cars belong to the collection of the Bavarian Railroad Museum in Nördlingen (BEM).
The 37478 locomotive + the 43136 car + the 43151 car make up the special train at the Model Railroad Meet.