How often to change transmission fluid?
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Joined: Sep 2015
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From: Milwaukee, WI USA
2012 C300 4Matic
Just curious, if Mercedes changed the recommendations from 40K to 70K starting in 2013, why do you recommend keeping it at 40K? I am have to believe Mercedes changed something for them to change the recommendation that much.
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2014 C300
I have something in the mid 30's at the moment. thanks
Last edited by Aimbit; May 16, 2019 at 10:44 AM.
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2012 C300 4MATIC Sport
This is probably not the full service including draining the torque converter which requires more fluid. Double-check since some dealerships don't train the torque converter unless specifically requested by the customer.
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From: London ON Canada
2012 C300 4Matic Sport Sedan
Originally Posted by xsever
This is probably not the full service including draining the torque converter which requires more fluid. Double-check since some dealerships don't train the torque converter unless specifically requested by the customer.
Junior Member
Joined: Nov 2017
Posts: 18
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From: Thornhill, Ontario
2019 AMG C43
It is the full service, I had an issue with it the first time they didn't not drain the TC had to call MB CANADA. The issue was quickly resolved lol I've been 3 times since and on every invoice they state TC drained. I was really surprised with the price myself and it's been the same price all 3 times.
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Joined: Aug 2019
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From: Europe
09 SL500, 03 E320 CDI Wagon
Please explain to me your view of the difference between a flush and a oil change.
i must say that I am excited to hear your answer, since it defies every logic.
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From: London ON Canada
2012 C300 4Matic Sport Sedan
Originally Posted by Charlie11
Marko, which dealership do you go to? I need to do the same and that price seems quite reasonable.
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Joined: Nov 2008
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From: SA
2008 C350-Sport-AMG-Active Agility Pack(Not reliable) +Izuzu KB6 3L(It seems Reliable)+Mazda
I understand a flush is where you use other fluids(Sometimes with big promises) than the specified oil to clean out the plot, then add the oil.
Changing the oil, or I ask them to replace the oil, no other fluid types are involved.
This is my understanding of flushing anything. So if I ask them to flush the gearbox, I would expect me to be ready(financially) to have it taken apart in near future as well, more costs....
Changing the oil, or I ask them to replace the oil, no other fluid types are involved.
This is my understanding of flushing anything. So if I ask them to flush the gearbox, I would expect me to be ready(financially) to have it taken apart in near future as well, more costs....
Last edited by Moto_Guzzi; Aug 12, 2019 at 03:31 AM.
Senior Member
Joined: Aug 2019
Posts: 340
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From: Europe
09 SL500, 03 E320 CDI Wagon
I understand a flush is where you use other fluids(Sometimes with big promises) than the specified oil to clean out the plot, then add the oil.
Changing the oil, or I ask them to replace the oil, no other fluid types are involved.
This is my understanding of flushing anything. So if I ask them to flush the gearbox, I would expect me to be ready(financially) to have it taken apart in near future as well, more costs....
Changing the oil, or I ask them to replace the oil, no other fluid types are involved.
This is my understanding of flushing anything. So if I ask them to flush the gearbox, I would expect me to be ready(financially) to have it taken apart in near future as well, more costs....
Flushing means getting ALL the oil changed, in the system.
They connect a portable oil changer in the oil cooler circuit, let the engine run. They drain the transmission sump, change the oil filter. They pump in new fresh oil. By changing the oil several times, that way, you get a fully flushed transmission, running only fresh oil, no mix of old and new oil.
This way, with a flush, they get ALL the oil changed, and not only the volume in the sump of the transmission + a minor part on the converter, even letting the engine run, and shift through the gears, as recommended in many other post.
Some even drain the transmission again after flushing, change the oil filter once again, and top up with fresh oil.
Look at this video.
This is an example how it's done.
No rinsing fluids, or detergents should ever be used. Only the recommended ATF oil. A full flush will require approx 4-5 gal of ATF if the oil is very dirty, or less, if oil has only slightly darkened.
