the longer of the 2 unknown linkages is the "Thrust arm"; in the (190e) Haynes manual, it is referred to as the "Pushing Strut". I believe it is so called because it transmits the forces that propel the car forward.

the shorter one is the "Torque strut"; this is referred to as the "Pulling Strut" in the Haynes manual. I believe it is called a "Torque strut" because it converts the braking torque into an anti-lift action on the rear suspension.