I have a 1999 S500 that I bought recently and I am going through it at the dealer. I found a used PSE pump on ebay and got it to replace the one that burned up at the dealer when they were troubleshooting my door lock issues. So now I have one that does not work.

My question is.

Are there any shops that rebuild these things? I figure that having another spare would be good given that the replacement was a used one. New ones are $1400 so rebuilding them seems like a good plan.

Apparently the 1998-1999 pumps are pretty rare.

 

ProgRama Remanufactured Electronic Control Modules 2-3 YEAR warranty
Located in Ft. Lauderdale. don't know if they will rebuild your but you can buy from them and then send in your core...ask if they will rebuild yours...