Fuel Filters Service Interval??

[Gregory]

I looked in my owner's manual and don't see the service interval for the fuel filters. How many miles before replacing them?


I just changed the two filters on my 300 SDL and 3 things immediately improved.

When coasting to a stop, sometimes the engine would stall from low RPMs. Feathering the throttle while braking was the workaround to prevent stalling. Now the RPMs stay up enough to not stall at traffic lights.


The car now starts a few seconds faster.


Because the car starts faster, the climate control glitch seems to have gone away. When cranking, the system voltage drops. If the CC fan tries to come on when the voltage is low, it fails to start, and it won't start blowing until the key is switched off and the power to the climate control is restored.

I've had some frigid winter and hot summer drives because of that glitch. Sometimes I would switch the car off and on again while at speed on the freeway. That would recycle the climate controls so the fan would start blowing.

So if you haven't changed your fuel filters in a long while and have any of those 3 problems, it may be time to change the filters.