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Discussion Starter #1
Is the service interval on the 2011 GL450 every 10,000 miles or 13,000 miles? Or once per year?

On our C230, I thought the indicator turned on at 13,000 miles.
 

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2006 E320 CDI, 2009 ML320 Bluetec, 2009 GL320 Bluetec
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It's all in the service/maintenance manual that came with that vehicle...you got one right?

The Owners manual even has a nice section that describes the FSS...you may want to check that out as well!
 

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I replace the oil/filter every 5000 miles.
Brake fluid and coolant flushes every 20000 miles. brake pads and rotors usually worn by then as well.
Transmission fluid at 40000

I don't buy FSS crap. I know how I drive. I know what my car goes through in DC's stop and go traffic and I have it serviced to MY standards for MY peace of mind.
 

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I replace the oil/filter every 5000 miles.
And you double the wear of the motor with MORE frequent oil changes...The original interval was supposed to be 20K, MBUSA pushed to keep it at 10K due to lost profits at the dealership level.

Stop doing this, you are not only wasting oil but causing more wear on the engine. You would be better off not changing the oil and going to a 20K interval, this would reduce you actual wear by over 5 fold vs 5K oil changes!

Wear in the first 3000 miles of an oil change are HIGHEST, at 10K the wear rates are less than 1/5th of what they were in that first 3000 miles.

Brake fluid...every 20K
Slow down there, mileage has NOTHING to do with brake fluid performance! Brake fluid is hygroscopic, it absorbs moisture from the air. Brake fluid life is a function of asbsorbed water over time. The DOT4+ and other MB approved DOT4X fluids all have a very high tolerance for moisture.

The maximum you want to run it is 2 years and this is the factory recomendation. You could also test the boiling point, and this will also lead you to a 2 year interval as a very conservative route.

Again no benefit to overservicing the brakes.

Do avoid using colored fluids, they stain the system and make it impossible to monitor the fluid for opacity (moisture). As a fluid darkens this helps to indicate the amount of moisture or other contamination in the system. Clear and brite is the phrase to remember.

coolant flushes every 20000 miles.
WTF?

STOP RIGHT THERE! Coolant is NOT just some green juice that you pour into a system that lowers the boiling point!

MB coolants and other G-XX series are HOAT type coolants that do more than just stop the fluid from freezing!

The G-XX series coolants have additives that cause a caustic reaction inside the motor and STOP corrosion by CAUSING corrosion!

All you have done is INCREASED the corrosion in your system!

There is a VERY good reason why the coolant change interval is 15 years 150,000 miles! They do NOT want you to cause excessive corrosion in the system!

The coolants require about 10,000 miles of driving to stabilize. During this time the coolants react with the metals and form protective layers that stop any further corrosion from forming. Once these layers form the coolants pH is balanced out and no further corrosion occurs.

MB uses a SEALED cooling system, in other words there is no exchange of air or moisture that can throw off the balance of the systems chemical properties.

Blindly changing coolant takes a once stable system from a chemistry standpoint and turns it into chaos!

Also, anytime you replace the coolant, you need to replace the coolant tank. There is an additive package in them that maintains the proper amount of phospates to prevent system erosion.

When you do get to 15 years or 150,000 miles replace the coolant tank, water pump and serpentine belt along with any idler pulleys in the system.

Transmission fluid at 40000
Transmission fluid depends, take a sample, most that I have seen are due at 20K (7-speed) and are lucky to get to 30K without needing a flush and filter change.

Don't guess, pull a sample and know for sure.

Your type of driving may not result in the same type of wear my driving does. My results are based on nearly 100% city so YMMV.

I don't buy FSS crap. I know how I drive. I know what my car goes through in DC's stop and go traffic and I have it serviced to MY standards for MY peace of mind.
How many start cycles are on your car?
Whats your average speed per day?
Whats the number of cold starts since new?
Since the last oil change?
Whats is the oxidation level of your current oil change?
How many DPF regens have you seen, when did they occur and were they interupted?
How is that balance looking on the injectors?
How is the compression on Cylinder #1 doing?

You don't know jack about your car....That FSS is more in tune with what you are doing than you could ever hope to be.

FSS monitors more than mileage, it tracks EVERYTING related to that vehicle.

The only issue I have with it is the fixed interval BS, MBUSA should have left it as designed to function as intended!

You obviously don't know much about any car based on some of your recomendations above...Drive more worry less and FOLLOW THE MANUAL!
 

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I have followed my maintenance regimen on EVERY car I've owned, with the exception of my pre-war cars, which are maintained more often and more thoroughly.

I have done this regimen on my W124's, W140's, R129's, as well as many BMW's, P-cars, Allantes, Ferraris, Maseratis, RR/B's, etc.. I had a 1988 Silver Spur that I drove daily for 5 years from 30k miles to 170k miles and I did the exact same regimen that I listed above.

My MB dealer does all the maintenance on my GL450. Coolant tank was also replaced when coolant flush was performed. You seem to have confused what I have now with what I have on order.

Regardless, I stand by my maintenance schedule. Always have and always will. I did this same thing with the 2008 ML320CDI that preceded the GL450 and I put 50k miles on that ML320CDI in a year.

I drive 50-60k miles/year; 70% city driving.
 

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I have done this regimen on my W124's, W140's, R129's, as well as many BMW's, P-cars, Allantes, Ferraris, Maseratis, RR/B's, etc.. I had a 1988 Silver Spur that I drove daily for 5 years from 30k miles to 170k miles and I did the exact same regimen that I listed above.
And this has WHAT do to with a 2011 era aka modern engine running a COMPLETELY different oil type?

Regardless, I stand by my maintenance schedule. Always have and always will. I did this same thing with the 2008 ML320CDI that preceded the GL450 and I put 50k miles on that ML320CDI in a year.

I drive 50-60k miles/year; 70% city driving.
All the more reason to stop wasting engine oil and sacrificing the engines durability for no reason.

At the MINIMUM perform oil changes at 10K, if you are REALLY interested in lowering the wear switch to 20K.

All you have to do is look at the oil sump size, this is the biggest give-away that these engines were never intended for 10K oil changes.

These engine have nearly double the sump capacity, require modern engine type specific synthetic lubricants.
 

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Discussion Starter #8 (Edited)
I did some more research on the service intervals. Starting in 2009, MB changed the service interval to 10,000 miles. Prior to 2009, the service interval was flexible depending on driving patterns but usually 13,000 miles. I hope this change was legit and not to increase dealer profit.

Also, transmission oil used to be lifetime but now 40K.

The $805 30,000 mile prepaid maintenance program may make more sense based on this info.
 
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