I saw some of the Alfas on the TPC Discord, really nice, keep them coming ^^ I like the bike-themed once especially, the Alfa is so small, it seems very appropiate to go with a livery from motorcycle racing.
About the Benz, good question...I have one or two DTM-themed liveries for the Mercedes in my collection, they work quite well I think, especially the Black #3 Sonax one, but it makes the car look weirdly modern some of the times. Maybe they would look cool if they got backdated to the 60s/70s with the older logos by the same sponsors? ...ah, and I think one of my favourite Mercedes liveries was the blue and white striped Boss Mercedes SL driven in the early 80s Paris-Dakar.
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Or maybe commit some heresy and repurpose the SL to one of its direct rivals by giving it a livery from one of the many Steinmetz Opel Commodores ^^:
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