are you talking about a spin on metal fuel filter? If so they last virtually 
forever. A paper filter will last as long unless exposed to high levels of 
moisture for long periods. 

91 300D 

----- Original Message -----

From: "Richard McGinnis" <> 
Sent: Saturday, July 18, 2015 1:38:02 PM 
Subject: [MB] do fuel filters ever fail out of the box or have a shelf life? 


Just finished replacing the fuel pump on our 1987 190E. While things are 
better, they still aren't right. The car won't idle but will run around 
1500 rpm+. 

Since this whole thing started when I replaced the fuel filter, I was 
wondering if they are ever bad or if they have a shelf life. The one I 
used was a Bosch that I think is 2-3 years old. 

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