I called Freightliner in Las Vegas and asked them if they had the parts available if I took my coach down there to change the filter. The shop foreman that is in charge of the motorhome area asked me how many miles I had on the coach and he asked if I drove where it rains a lot. I told him most of my driving was in dry climates. He said not to worry about changing the filter if the dryer is working proper. He said to change it if it starts purging repeatedly. If it just lets out a big blast of air after you charge the reservoirs and not again, he said not to worry about working on the air dryer. So I will extend my filter change.
