The only limitation like this is that you're entitled to one covered service "per incident", and thats standard for almost all of the RV road service plans.
ie: if you have a flat tire and/or mechanical breakdown at the same time, Coach-net will pay for either a road service response or a tow, not both for that same "incident". Its important you understand the total problems and the corrections available by the road service company before you request their service. Sometimes its best to talk directly to the road service mechanic first, not just the phone answerer at Coach-net.
If you ask for a road service response, and then after they come out, they discover they can't fix all your issues on the side of the road, then you used up your one covered service per incident and the tow cost is now on you. Thats why some of us carry both Coach-net and Good Sam ERS, its cheap insurance to have multiple choices & coverages.