01 E 320 Transmission goes to Neutral
If the board or the range recognition switch got wet it can short out.
Go to the diy section on ww.benzworld.org w210 forum.
You could try to clean it and it might work if you still have function and it is not going into limp mode and staying stuck in second gear.
Don't buy new if it has failed.Pm me first
I've been down this road before. I had to replace mine 3x till finally the last one fit perfect. The 1st one just wouldn't line up correctly the 2nd I had issues with the - + triptonic. 3rd one perfect fit

Good Luck not an easy job... ( but very easy, time-consuming )
I was able to purchase mine through Ohlord



at a great price
https://mbworld.org/forums/w210-amg/...ft-module.html
The DIY link that Ohlord is referring to is in my link



