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20K mile B service update

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20K mile B service update

 
Old 02-28-2019, 10:43 AM
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20K mile B service update

20K mile, B service on my 2018 450 4Matic
1. front brake pads at 3mm, rear at 4mm. Wow- so much pad wear.
2. coolant cap replaced due to seal issue as i was getting a message 'coolant low....'. known problem apparently as it was replaced with a redesigned version of the cap.
3. centre console armrest was not heating with the seats and door armrests. burnt out so will be replaced.
4. rear headrest rattle - removed and lubed.
5. whining noise from rear drivetrain - could not be reproduced apparently. Will have to drive along with tech to demonstrate it.

is the brake pad wear normal?
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Old 02-28-2019, 11:16 AM
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If you use distronic a lot, yes this wears out the pads.
Stability control also uses the pads to stabilize the car.
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Old 02-28-2019, 11:21 AM
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The only part of distronic I don't like is when you approach stopped traffic at speed the system waits too long and then brakes heavily. I tend to work around this by overriding it and braking more gently.
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Old 02-28-2019, 11:30 AM
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27K for mine and the pads were done- front and rear. They work very well but I will be switching to the ceramic Disc Italia pads for a lower dust and longer life on the next brake job. The dust is insane, constantly cleaning the rims.
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Old 02-28-2019, 03:08 PM
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good to know. thanks. Does anyone know if brakes are included in the prepaid maintenance?
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Old 03-01-2019, 07:26 AM
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Agree with this one

Originally Posted by MikeAtLincoln View Post
The only part of distronic I don't like is when you approach stopped traffic at speed the system waits too long and then brakes heavily. I tend to work around this by overriding it and braking more gently.
You are so correct. Almost feels like I am speeding up, just prior to Distronic engaging braking for stop lights. I initiate manual braking anytime I see traffic stopped at a light.
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Old 03-01-2019, 08:36 AM
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Originally Posted by Merserybenze View Post
good to know. thanks. Does anyone know if brakes are included in the prepaid maintenance?
I believe so, I just extended mine and the filters and oil change and wipers were included.
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Old 03-01-2019, 10:55 AM
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Originally Posted by seamus2154 View Post
27K for mine and the pads were done- front and rear. They work very well but I will be switching to the ceramic Disc Italia pads for a lower dust and longer life on the next brake job. The dust is insane, constantly cleaning the rims.
I had the Disc Italia pads installed soon after I bought the car. After one year (8K miles) the pads were at 11 MM. The wheels stay a lot cleaner as well.
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Old 03-01-2019, 08:00 PM
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Originally Posted by Merserybenze View Post
20K mile, B service on my 2018 450 4Matic
1. front brake pads at 3mm, rear at 4mm. Wow- so much pad wear.
2. coolant cap replaced due to seal issue as i was getting a message 'coolant low....'. known problem apparently as it was replaced with a redesigned version of the cap.
3. centre console armrest was not heating with the seats and door armrests. burnt out so will be replaced.
4. rear headrest rattle - removed and lubed.
5. whining noise from rear drivetrain - could not be reproduced apparently. Will have to drive along with tech to demonstrate it.

is the brake pad wear normal?
Item #5 I have a whining noise I can replicate. At approximately 56MPH to 63MPH the whine will occur. It does not matter what gear the car in in and will change with speed. I was told this was normal. I have yet to check in another car.
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Old 03-01-2019, 08:17 PM
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ive never heard it in my car.
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Old 03-01-2019, 09:00 PM
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If it changes with the speed and gear doesn't matter, even neutral, it would point to the rear differential. A whining is usually indicative of the diff. Hubs make some strange noise when bad also which is a possibility if speed related but not gear. Old or worn tires can roar and make road noise but not whine. If it's not rpm based that eliminates the engine, if not gear based or sure it's not trans the next is the diff and hubs. They can put a device in your car to determine it's location. If I remember its a picoscope. The dealer will have one.

Found it:https://www.picoauto.com/products/no...g/nvh-overview
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Old 03-02-2019, 12:07 PM
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Unless you get a really good AND S class experienced dealer you will get the run around until you give them a TSB. I got mine cleared up when I gave them a copy with my work order.
They often say o yeah that doesn't apply blah blah. There are other tech tips/news sent or available to dealer techs that are not published as a full on TSB. Not aware how to get them.
There are probably other TSB's on this issue.

LI35.31-P-061268 APR15 – 222 up to production date 10/10/14 rear axle drive train howling noise between 50 & 70 mph, check left side shaft to see if rotary mass has been installed on inner joint.

LI35.00-P-060851 FEB15 – 222 4matic produced before 10/14 howling or whistling from rear differential @ 50-60 mph, replace rear axle shaft to part 2223507802 (has updated damper).
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Old 03-02-2019, 12:11 PM
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In Canada besides the normal wty there is a wear warranty for 2 years/40 K that includes brakes pads/rotors.
Makes sense when the car is applying the brakes on it's own in many situations. (When it's raining being a weird one)
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Old 03-02-2019, 12:27 PM
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Originally Posted by MikeAtLincoln View Post
The only part of distronic I don't like is when you approach stopped traffic at speed the system waits too long and then brakes heavily. I tend to work around this by overriding it and braking more gently.
I completely agree and do the same thing. The system is magnificent, but good drivers will always monitor it.
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Old 03-02-2019, 12:30 PM
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Originally Posted by MikeAtLincoln View Post
I had the Disc Italia pads installed soon after I bought the car. After one year (8K miles) the pads were at 11 MM. The wheels stay a lot cleaner as well.
ANY downside to the ceramic pads? Squeaks? Noise? What does MB say about it? Any problems voiding some warranty aspects?
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Old 03-02-2019, 01:18 PM
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i did give them print outs of the two TSBs when I dropped the car off. didn't help I guess. i have to go back and help them identify the noise.
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Old 03-03-2019, 12:47 AM
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Originally Posted by wilfie View Post
Unless you get a really good AND S class experienced dealer you will get the run around until you give them a TSB. I got mine cleared up when I gave them a copy with my work order.
They often say o yeah that doesn't apply blah blah. There are other tech tips/news sent or available to dealer techs that are not published as a full on TSB. Not aware how to get them.
There are probably other TSB's on this issue.

LI35.31-P-061268 APR15 222 up to production date 10/10/14 rear axle drive train howling noise between 50 & 70 mph, check left side shaft to see if rotary mass has been installed on inner joint.

LI35.00-P-060851 FEB15 222 4matic produced before 10/14 howling or whistling from rear differential @ 50-60 mph, replace rear axle shaft to part 2223507802 (has updated damper).
I will print this out and bring it with my next service. Thanks for the information.
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Old 03-03-2019, 10:23 AM
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Originally Posted by Streamliner View Post
ANY downside to the ceramic pads? Squeaks? Noise? What does MB say about it? Any problems voiding some warranty aspects?
They are more expensive than most brake pads. I know MB will not install them so I had an independent shop do the work. I can't see how they would void warranty but I feel it's low risk.
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Old 03-03-2019, 10:26 AM
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Originally Posted by MikeAtLincoln View Post
They are more expensive than most brake pads. I know MB will not install them so I had an independent shop do the work. I can't see how they would void warranty but I feel it's low risk.
But no squeaks, noises and much less dust?
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Old 03-03-2019, 10:40 AM
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[QUOTE=Streamliner;7695874]But no squeaks, noises and much less dust?[/QUO
They work great! Perform as well or better than the OEM parts. There is still some dust but much lighter color and less of it so does not show for quite a while. No squeaks or any kind of noise. The only downside I am aware of is cold weather performance. They don't stop as well until they warm up.
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Old 03-05-2019, 10:21 PM
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3. centre console armrest was not heating with the seats and door armrests. burnt out so will be replaced.
The part was ordered from Germany- took three days. Centre Console has to be removed to install this part - took a day plus to install the part..hopefully pick up the car tomorrow.
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Old 03-06-2019, 09:31 AM
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Ceramic pads

Originally Posted by Streamliner View Post
ANY downside to the ceramic pads? Squeaks? Noise? What does MB say about it? Any problems voiding some warranty aspects?
my mechanic told me ceramic pads will wear out the rotors faster as they are a harder material.
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Old 03-06-2019, 01:14 PM
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Originally Posted by Rhschnauss View Post
my mechanic told me ceramic pads will wear out the rotors faster as they are a harder material.
I have never found that to be true with ceramics in comparison to the stock pads. The stock pads are almost a racing compound made by Brembo and Pagid. Very aggressive to the rotors. Mercedes designs it for cold and hot stopping all climates, and to compromise the rotor by design. Go to Mercedes for a brake job and it includes rotors as they don't cut them. I find 2-3 sets of pads (Mercedes pads) on a set of rotors...if you catch it before the sensors go off. When changing brands or material I think the biggest question is will it be aggressive enough as it's a heavy car. It seems the Disc Italia have found a sweet spot it having great stopping power and low dust which indicate its a little less aggressive with still being effective. This will be my last set of MB pads going to try the Disc Italia after much research and reviews from members.Tired of the dust....
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