Symbol 2595B from ISO 7000 - Title/Meaning: Trailer towing mode; two-axle wagon Function/description: To identify the control which changes the transmission mode for towing a trailer. To indicate the operational status of trailer towing mode. To indicate that a two-axle wagon is connected to the tractor.
pay attention to orientation of symbolApplication referenced in: ISO 2575
Additional information: 
This symbol may be used with a numeric indicator of the number of wagons connected to the tractor or of the numerical order of this wagon among those connected to the tractor
Alternative to symbol ISO 7000-2595A.
Own work using: iso.org/obp/graphics/grs/dc35a9f5-5e3e-4a9d-b02d-00889806f0e6 200.png
Vectorization:  Mrmw