I want to do it myself.

Is it as easy as changing the oil and oil filter?

 

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.

 

Any idea why this is... Other than Mercedes says so?

 

I would say only use New Clic clamps - do not reuse.
Clic clamps are needed due to the Fuel Pressure PSI being very High -
Injector Sprays over 10,000 PSI & I have seen return hose on Fuel Filter Blow Off.

 

I found this at Benzworld Posted by 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).

 

YOU (or anyone) cannot tighten screw-type clamps properly.

BY DESIGN, CLIC clamps exert the required pressure.

What makes you think a screw-type clamp will maintain its tightness? A CLIC clamp will.

It is EXTREMEMLY foolish to think "Mercedes says so" is anything but what you should, in fact do. To think otherwise is childish, but more to the point if you're not an engineer your thoughts on the subject are meaningless.

 

The reason I ask is that many manufacturers use certain connectors to either save money or to make assembly go faster at the factory.

In addition many manufacturers also incorporate a certain level of self maintenance discouragement into their designs in order to boost revenue for service points. Special torx and reverse torx fasteners simply to either save money, or discourage owners from performing simple maintenance.

I would not exclude Mercedes from this club. Just because Mercedes says I should pay double for AdBlue solution for example does not mean it is wise to do so.

Maybe its the fool in me, or maybe its childish, but I did not use CLiC connectors on the fuel lines. It was screw type for me

The trick is actually not to gorilla OVER tighten the screw type clamps. As it will damage the fuel lines.

No fuel leaks here.

 

"but more to the point if you're not an engineer your thoughts on the subject are meaningless."

I am sure there is a more productive, tactful way to get your thoughts across without blatanly insulting people. We'll simply chalk it up to bad day and leave it at that.

If it were me I would probably use clic clamps, but high quality 'fuel' clamps will work also, you will just have to check them periodically and use thread lock, either red or blue. Note I said 'fuel' clamps not hose clamps, both are screw type but inherently different. Fuel clamps are not worm screw types. Factories use clic clamps for many reasons, the biggest reason is that when the clamp is tightened to the proper tension it will click. This makes it both faster and more reliable to install quickly in both a factory and repair environment.

My $.02

Bryan

 

Baron11,

I've been reusing the clic clamps using just regular pliers, but it seems likely that one time I'm going to bugger up the locking mechanism. What do the fuel clamps look like? I'm not familiar with them. Something that I can get at any parts store?

 

you guys know that there is no high pressure at the filter- right? the high pressure pump is close to the fuel rail and is "after" the fuel filter - right?

also, you do know that there is nothing magical about the clic clamps- right?

 

We need this guy to chime in.

http://www.benzworld.org/forums/gl-c...ml#post4109479

 

FWIW, I believe the CLIC clamps are the way to go. I just did the fuel filter on my 2009 GL320. The previous owner had used worm gear style clips. The hose ends were damaged such that when I took the clamp off and tried to reuse it, it would not stop leaking. I had to get a new hose for $14 (not too bad). The additional problem is not worth saving a few bucks on clamps. Yes, it's annoying, but you can get a pair of Astro Clic pliers for $20 on Amazon ( ), and they make it very easy to use the clic clamps. I think one should just plan on using the correct clamps each time, so add another $10 to the DIY cost. (I did try to use the traditional hose clamp, not worm gear, style clamps from ID Parts, and those seem to be fine also. We'll see in 20,000 miles.)

 

They are indeed the way to go.

The Mercedes WIS procedure explicitly forbids use of screw type clamps. It also specifies (specify is not the same thing as recommend) new clamps be used.

Here is a video on CLIC clamps

https://www.hazet.de/media/mp4/ed/b6...gsvideo_de.mp4