Changing Fuel Filter on 2008 GL 320 CDI

[dariof]

How is this accomplished?

I want to do it myself. Is it as easy as changing the oil and oil filter?

[lkchris]

It's not and you shouldn't attempt it without referring to the service DVD or WIS procedures obtained via startekinfo.com

You may NOT use any other hose clamps other than type originally fitted and procedures call for their replacement rather than reuse when changing filter. CLIC clamps require special tool to remove/install.

WIS procedure is AP47.20-P-0780GZD

Understand that this is a 25,000 psi system, although that may not be the pressure at the filter.

Change interval is 20k miles.

[drivbiwire]

The fuel filter is a lower pressure system approx 20 psi.

As you mentioned retain the original fuel line clamps and do not use worm type.

The filter is relatively easy to replace however you should refer to the manual for proper direction if unfamilar.

The fuel filter has a removable water sensor.

Purging the new fuel filter is easily done by connecting a line to a catch container and cycling the ignition on and off approx 5 times. This activates the tank mounted pump which pressurizes the lower pressure system. Air is expelled from the fuel filter outlet (to the high pressure pump) thoroughly purging the system of any air.

Keep in mind EXTREME care must be taken when connecting the fuel lines and installing the water sensor. The last thing you want is a fuel leak on top of the motor (major mess to clean up and less likely to be a fire hazard).