The NA and SRT tanks are different.
Mercedes SRT tank is #170 500 05 49, Chrysler #05135388AA.
Mercedes NA tank is #170 500 03 49,Chrysler #05101601AA.
Do not buy the tank using the Chrysler number at a Chrysler dealer it will cost too much.

 

NA Mercedes #170 500 03 49. Had to find what bucket it was in...

I was rereading the repair , what epoxy did you use. I'm going to do this to an old one for an extra. In case I drop another wrench..

 

I broke the nipple on my NA a year ago replacing the water pump. I drilled and tapped the hole, the fitting felt good going in but it seeped just a little coolant. I added som Teflon tape to the threads and it still leaked ever so slightly. I got tired of cleaning it up so I got a new tank. Don’t think I would try that fix again.

 

Smart decision, saving money is great but out in the middle of nowhere with a serious tank leak, you would pay a good few hundred bucks for a new tank.
Not so potentially serious was getting a new WS washer tank instead of fixing the old cracked one in my car. In my younger days I would have fixed it because it really was not a serious problem, taking the tank out is a pain in the butt.