I used the “turkey baster method” to drain and replace the brake and power steering fluid on both the Ram and the Mercedes. I used DOT3 brake fluid I had on-hand and Dexron/Mercon III ATF for the power steering.
Interestingly, the Mercedes had dark green brake fluid. It looked a lot like olive oil. This thread suggests that might have been the result of mixed blue and amber brake fluid without a flush being done. The Benz’ brake fluid looked otherwise clean, though.
The Ram, on the other hand, had the typical old dark brown brake fluid, but it also had black chunks in it. Looked long overdue for a replacement.