Happy Turkey Day to all.
We had our first cold snap down here in Florida a bit back and last week I noticed blue fluid on the floor under the Crossfire. Identified it as wiper fluid, got on the fourm to research and found that it most likely was a cracked tank. Opened up the wheel well to inspect and the tank looked good, however I noticed that there is a rubber plug in the lower side of the tank, maybe an unnecessary drain plug? In a previous post regarding the tank removal you can see it in the pictures. The plug was the source of my leak, it was a bit loose and has seemed to have contracted and not sealing all the way. My solution was to wrap the plug with a good rubber electrical tape that stretches, not the regular cheap stuff. I inspected the rubber grommet under the tank and it looked good but added some peel and stick rubber backing that I had to give it some added protection. So far the tank is not leaking. Sourcing a replacement plug might be a challenge but it’s similar to what you see in boat live bait wells or inner hulls, if the leak comes back that’s what I will try.

 

Part number for the plug from Mercedes is 2109870045

 

Thanks Ronman.
Found one on eBay looks like is for optional MB headlight washer pump.

 

Cheaper to buy from Mercedes dealership. The hole is for optional headlight washer pump.

 

Here is one: https://www.autohausaz.com/pn/MB-1708690320

 

Thanks for the link, you made my day.