You do not need model in this case. You need to replace BOTH the RH and LH Torsions spring assbly's. 1 is bad and the other after 15 years is probably ready to fail. Doug
This is the RH white which will be at the front of the RV
https://www.dyersonline.com/dometic-polar-white-two-step-right-hand-torsion-assembly.htmlThis is the front Black RH. It depends on your color. The RH has the LOCK assbly while the LH(if you can find one) is just a spring.
https://www.dyersonline.com/dometic-black-two-step-right-hand-torsion-assembly.html