anb957

FYI and please correct if you disagree. I took this info from the maintenance booklet.

1. Oil/filter change every 10K
2. fuel filter change every 20K
3. Replace brake fluid every 2 years
4. Cabin filter change every 30K
5. Engine air filter every 40K
6. ATF and filter change every 40K
7. coolant change at 150K
8. there is no timing belt. The serpentine (accessory belt) has no scheduled replacement and is to be inspected every 20K miles.
9. front diff, rear diff, transfer case fluids--no scheduled interval--it says to "review" at 150K miles

lkchris

What's to disagree with if it's printed in the maintenance booklet?

I agree that's what's printed there if that's what you're looking for.

Mercedes engines have timing chains and not timing belts.

All intervals specified are quite reasonable and the only one that's even a little questionable is the brake fluid change (too often) but it's not worth fighting it.

If your GL320CDI is a 2007 or 2008 and the trans fluid hasn't been changed yet, there's some advantage to doing so early because a new specification fluid is now distributed that improves transmission operating characteristics. 7-speed transmission fluid changes are basically impossible for DIY.

anb957

Thanks Kent...
I was just checking to see if anyone disagreed with the maintenance intervals. Esp the diff fluids not having scheduled replacement. But many cars say lifetime for the rear diff so probably not too important.

Anyway, that is interesting info on the ATF. We have not been happy with some of the low speed downshifting. Will the dealer cover the change over to the new fluid? Is there a TSB on it? we only have 4K miles so far.

Danno4x4

ANB... Good summary... That is the same as what I have noted.

I just completed a 30K mile service on our 2007 GL320. Since I had to remove the Engine Air filter housings to get to the fuel filter, I went ahead and replaced them as well (sourced from Autohaus). They were actually pretty dirty (lots of insects) so I am glad I did it at 30K rather than waiting till 40K.

cablvr

Danno - how do you access the air filter?

Fourdiesel

It is pretty easy to disagree when the 'book' insists on a fleece oil filter (several places) and one can't be obtained from any source - including a dealer! If they messed that up, what else is questionable?

Oil change interval of 10k mi for the CDI engines has been the subject of some discussion, Drivbiwire and others have noted that, providing the proper full synthetic oils are used, the 10k interval may be unnecessarily conservative. It was apparently put in at the insistence of MBUSA to "simplify" their dealer's training [And to increase dealre income?]. It has been noted that the european change intervals are variable. The car's computer - european models - specifies oil change intervals up to 19k mi based on the driving conditions YOU use.

In my case, I drive many more highway miles than short, cold miles. I am quite comfortable extending my OCIs to 15k mi. I am quite sure I am not damaging the engine by extending the change interval.

smiledr996s

Reviving old thread

Curious if there are any other specific items that would be suggested as preventative maintainence on higher mileage vehicles before eventual failure.

I have 136 on an 08 cdi currently and love the vehicle. I put probably 25k+ a year and hoping to keep a long time.

chsu74

I would send your oil to Blackstone for testing and decide. There are members who test here and 7500 seems to be the number for oil changes. 10K is high.

Buy an oil extractor and it is a 32mm nut to open the oil filter housing. An oil change is around $80 DIY. Takes me 10min to do an oil change. Plenty of DIY videos on YouTube if you need help.

smiledr996s

Thanks I was curious about the intervals I usually change at 7500. Even if early feel safer. Was thinking about sending off just to see. Was disappointed that the 5w40 mobile 1 was dropped. I switched to castrol edge 5w40. Much harder and more expensive. I figured I had 120 on a 40 wt oil and did not want to drop to a thinner viscosity. Do seem to be burning less then with the mobile 1 and not having to add.

Really looking for small items my independent might be missing that are are not on the list. Other the obvious such as brakes ,mounts ect.

I am am on the road a lot and if there is a known week point I would like to change before it gets me. I figured others could benefit as well.

chsu74

Still available on Amazon. I don't buy it though.

https://www.amazon.com/dp/B000SKV4RA..._tiZhybH0WMT38

smiledr996s

No that's not approved for our engines. That's a different 5w40 formula. Iirc it will clog up the dpf. Ours was the ESP formula.