Originally Posted by
Billy22Bob
All respects....The plastic bag isnt the answer.
The pump has to breath and not sweat. There's info over at the MB R170 board.
Keep it in the foam box, but if the hoses dont already go down and up and enter under the base of the unit (inverted) like they did in the later models ...for this reason....you'll have to buy some rubber tube and extend them so it can sit upside down. I had to do this in my 2002. This also apparently stops the fuel filler nozzle from allowing water to drain down the pnuematic tube as well.
Check out the R170 forum.
I read about the plastic bag and the inversion of the unit on that forum, I do not advocate a tight fitting bag naturally. The inversion would be better though if you can do it, I am none to sure that it is that easy what with lengthening the hoses. So better the bag than nothing I say, at least it would prevent disaster with 6" of water if the plug remained installed. I'm not an advocate of the plug removal, I did that on another car and a build up of silt occurred due to less air pressure in the trunk I think. The silt stayed wet and rusted through.
Best to check for leaks and repair them properly and then do the mod that you like.