S-Class (W221) 2007-2013: S 320 CDI, S 350, S 450, S 500, S 550, S 420 CDI, S 600

New 2010 S550 owner

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Old Dec 6, 2023 | 08:17 PM
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10 s550
New 2010 S550 owner

Hey everyone! I recently purchased a 2010 s550 75k miles. Any recommendations or upgrades?

Thanks!



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Old Dec 6, 2023 | 08:59 PM
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2010 E63 AMG, 2003 E500
Very nice, how about clear sidemarker lights.

https://www.ebay.com/itm/173318159218
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Old Dec 6, 2023 | 09:16 PM
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10 s550
Originally Posted by Bahnstormer
Very nice, how about clear sidemarker lights.

https://www.ebay.com/itm/173318159218

Thanks !
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Old Dec 9, 2023 | 02:04 AM
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Congrats, that's a nice car
Mileage is low given age of the car but I would have it serviced anyway if there's no maintenance records . Yours is not an M278 , but can be upgraded anyway if you like
Happy Driving
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Old Dec 9, 2023 | 03:22 AM
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The quality of the drive is only as good as how fresh everything is on the car. Mercedes parts quality is insanely good and therefore the cars are a sum of their parts and fluids.

OEMTools oil extractor
Mann Freciousplus cabin filters, do them every six months, cleanest air in the industry, period
Hengst oil filter is superior to the Mann one I find, the air filters can match Hengst are great
Stockpile Valeo wipers, I find myself replacing them every 6 months I'm addicted to a clean/silent wipe on a car like this. I usually keep 2 sets and replace the MOMENT one wiper starts skipping
Chemical guys leather cleaner/protector, car smells BRAND NEW all the time, best chemicals on the market, you can take 10 years of filth off in 10 seconds on the steering wheel
Buy the 722.9 ATF adapter for your car for transmission service, it's $8 on Amazon, along with the quart Slippery Pete handpump, to do your own $800 transmission service for $160.
The car only drives as nice as the tires on it. Michelin AS4 or Continental DWS06+, nothing else will do honestly. Everything else rides hard, goes out of balance, chunks out, or has tire growl
Brakes wear out really fast on these cars and its expensive to use OEM. Swap them to the Z23 setup on Rockauto, the ceramic pads will last over 60k miles. I have never ever replaced a set of ceramic pads.
Replace your sway bar links in the front every 2 years. They go out real bad, use FCPEuro for the lifetime replacement. I have never paid for more than my original Lemforder set from them for 3 years on multiple MB's now
The cars are picky about batteries, if you are going through a battery every 3 years, it's completely normal.
Do NOT only swap pads on these cars. The rotors are thin and drilled so they get wavy and you can hurt the new pad with the old rotor.
Change oil every 10k, sooner if you want to. The recommended factory interval does not factor city driving or adverse conditions. 7500 is about where I normally go since my oil starts cooking off.


This is my link if you want to buy Amsoil products for your car specifically, make sure you sign up for the Preferred Customer program to save 25% off. It supports the forum and it supports me. It's cheaper than buying oil at the parts store and the products are very good quality. It's a one-stop shop for superb lubrication, cleaners, filters, and most importantly I feel the ATF for our cars is phenomenal. I used their DCT fluid in my GTS with wonderful results, run the ATF in my S and G.
https://www.amsoil.com/lookup/auto-a...-4/?zo=7236674
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Old Dec 11, 2023 | 09:59 AM
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"Buy the 722.9 ATF adapter for your car for transmission service, it's $8 on Amazon, along with the quart Slippery Pete handpump, to do your own $800 transmission service for $160."
Do you just drain and refill the amount drained?
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Old Dec 11, 2023 | 07:31 PM
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Originally Posted by mcb66
"Buy the 722.9 ATF adapter for your car for transmission service, it's $8 on Amazon, along with the quart Slippery Pete handpump, to do your own $800 transmission service for $160."
Do you just drain and refill the amount drained?
basically, cept you remove the pan and replace the gasket and filter too, it only takes 10 min extra honestly don't overthink it or over-research the job. You buy a VAICO 722.9 transmission filter kit with new gasket, levelling tube, and bolts, buy another set of bolts in case you lose any of them. Also note where the standoffs go, some are different. Run the car til its warm, drain it, fill it, overfill it slightly a couple more times to rinse it.

youll drain 5.5, you want to fill to 6, let it drain while running, then fill 1 more, run it through the gears, let that drain while running, to flush the old stuff out. its called "rinsing" and its a technique Pentosin and myself use.

and for the sake of anybody about to me on the job, you're supposed to measure the temp of the transmission either thru Xentry or an external temp gun, ive seen the difference in fluid, it doesn't matter.
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Old Dec 11, 2023 | 08:14 PM
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10 s550
Originally Posted by BenzV12
Congrats, that's a nice car
Mileage is low given age of the car but I would have it serviced anyway if there's no maintenance records . Yours is not an M278 , but can be upgraded anyway if you like
Happy Driving


what kind of service are we talking?
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Old Dec 12, 2023 | 01:14 AM
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Change all the fluids, and maybe some black tint.. It's a very clean car nice job
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Old Dec 12, 2023 | 02:25 AM
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Originally Posted by Cary5500
what kind of service are we talking?
Annual maintenance or service just like B3 . Your car is have many miles to get that B3 but I'm giving you an example .
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