Originally Posted by
onehundred80
Put the new pump in an open plastic bag under the foam in case it leaks again. Find and fix that leak now while you have some time without the pump in it.
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.