The problem is that cost on a new one is cheap and the cost of a tow truck is expensive if your $100 dollar, low margin part fails.
See? It really makes no sense to rebuild a part that costs less than $100. I am talking about dealer Net. Not retail.
BTW, I have about 50 of them in a box.
ASE CERTIFIED MASTER AUTO TECHNICIAN
MERCEDES SPECIALIST 11 YRS