39/40k mile service heads up
And it took more than ten minutes.
My V12 with an automatic ZF transmission was the same way, supposed to be a "lifetime fill". Ha! Don´t ask how much I have spent, as the transmission has to be dropped to gain access to the top plate. It's been done twice.
If I find the transmission training manual that has the procedure again, I will post it.
Please refrain from posting nonsense like this.Have you even looked at what a B service entails in the Mercedes maint. manual?
And please by all means do post your maintenance records when you sell that hoopdie or what will shortly be a hoopdie following the poor advice you have given.
DIY by all means,but to a complete job which is far more than a filter and fresh oil and a cabin filter

That poor 67 Chevelle, it deserves so much better

Mercedes Benz does NOT recommend a brake fluid change, transfer case change or a diff service on a C300, period. Dealers sell it to rip you off.
Mercedes recommends a trans service at 39k, a cabin fiter at 26k, an lof every 13k, air filters every 50k, spark plugs at 91k and a coolant flush at 143k as well as a fuel filter at 143k, the manufactuer has spoken for its product. A transfer case service, brake fluid change and a diff service is not there, and it is not there for a reason, it is useless! Your car will go well over 100,000 miles without these services, car will wear out before a diff or a transfer case. I have checked the manuals, a friend of mine is a servce director for a Mercedes dealer, and I am a service director for a dealership other than mercedes and I was also a Chrysler B tech for five years who is ASE Master certified with L1, I know. As a matter of fact, you can probably skip the trans service as well and still get well over 100,000 miles with no trans issues. The person who posted this is mad at me from another thread where I called his car an antique, which it is; I cant let his ignorance on this matter go unchallenged as I would be doing a disservice to my other fellow MB owners. Do not get ripped off by a dealer, your Benz can get by with just an LOf every 13k miles, and a trans service only once at 39k, thats about it. Change the air filters at 50k, cabin filter every 26k, and the plugs at 91k, about it. If you still have the car, change the coolant and fuel filter at 143k. Dont go for the steering flush either, another BS rip off!!! It is your money, take this sound advice from someone in the business or throw your $$$ in the toilet, it is up to you!
PS- My chevelle is in mint condition, new motor, trans, etc. Stops people in their tracks wherever it goes, I got offered $40k for it, said no. The rear is still original, why??? BECAUSE GEAR OIL DOSNT NEED TO BE CHANGED!!!
(Unless someone abuses the living hell out of the car or it is a 4wd and someone rides in 4lo on the roadway) Still has the original drum brake set up too, no need for a brake fluid change.
Last edited by 4maticbenz; Mar 17, 2011 at 09:08 PM.
I thought there were more than three; took me ten minutes, but I was a tech at one time, so I may be quicker, as I am used to working on cars, I remember five or six torx screws, three may be correct, I dont rememer, but is easy compared to paying a MB tech $50 labor to install.
How often should the brake fluid in my Mercedes-Benz be changed? Can any mechanic do it?
The brake system of a Mercedes-Benz consists of an interconnected array of components which operate with precision, speed and often extreme force over a wide range of operating temperatures and environmental conditions. From the brake calipers at each wheel, to under hood components such as the master cylinder and pump for Antilock Brake System (ABS) and Electronic Stability Control (ESP), the brake system contains complex parts that rely on brake fluid to perform their hydraulic tasks. Brake fluid is highly hygroscopic which means it tends to absorb moisture with age. This moisture consequentially creates corrosion within internal brake components and decreases the boiling point of the brake fluid, reducing braking effectiveness.
The recommended interval for replacing brake fluid is every 2 years or 20,000 miles, whichever comes first. The procedure used to replace brake fluid must be performed using approved pressure bleeding machines and "DOT 4 plus" brake fluid. The machines that are used by Mercedes-Benz technicians are designed to operate at pressures which ensure proper evacuation of the fluid and won't damage any of the precision braking components. These machines also ensure that new brake fluid entering the brake system is free of moisture.
If non-approved fluids are used or if the brake fluid becomes contaminated with mineral oil, then severe damage to brake components or brake failure can occur. It is essential that only qualified technicians using Mercedes-Benz approved equipment, parts and fluids perform maintenance or repairs on Mercedes-Benz vehicles.
Last edited by 4maticbenz; Mar 17, 2011 at 09:24 PM.
Which underlines my point in Post No. 29, that originally MB said the 7G was a "no fill", but they had a change of heart. However the transmission casing itself does not provide conveniently for this fluid/filter change.
On another thread https://mbworld.org/forums/c-class-w...ion-issue.html
on which you yourself posted a couple of times just yesterday, I posted a 722.9 transmission training manual, same thread has a video of replacement of the valve body. I forgot to mention that a thermometer is another tool for this fluid and filter change.
The point is that the 7G model 722.9 transmission was never designed to have its fluid changed.
Someday MB's manufacturing and engineering will catch up with their service recommendations, and provide an easy, inexpensive way to change the fluid and filter, so many can DYI and avoid high dealer maintenance changes caused by lengthy and LUDICROUS service procedures necessitated by initial inadequate design and foresight.
Last edited by Acapulco Bill; Mar 17, 2011 at 09:57 PM. Reason: typo
The Best of Mercedes & AMG
Which underlines my point in Post No. 29, that originally MB said the 7G was a "no fill", but they had a change of heart. However the transmission casing itself does not provide conveniently for this fluid/filter change.
On another thread https://mbworld.org/forums/c-class-w...ion-issue.html
on which you yourself posted a couple of times just yesterday, I posted a 722.9 transmission training manual, same thread has a video of replacement of the valve body. I forgot to mention that a thermometer is another tool for this fluid and filter change.
The point is that the 7G model 722.9 transmission was never designed to have its fluid changed.
Someday MB's manufacturing and engineering will catch up with their service recommendations, and provide an easy, inexpensive way to change the fluid and filter, so many can DYI and avoid high dealer maintenance changes caused by lengthy and LUDICROUS service procedures necessitated by initial inadequate design and foresight.
Last edited by 4maticbenz; Mar 19, 2011 at 05:37 PM.
How many of you will even have the car after 100k miles??? Prob. less than 10%, so all this maintenance is a waste of money on a vehicle that has planned obsolescence built into it; all cars are made to fail after a certain amount of time, (gotta keep people buying new ones). Do enough to make the car last for as long as you will own it, but dont kill yourself over every little thing that someone tells you that you need to do, you can do all of it and still have failures. Most important is an LOF, everything else you will not see any issues with til the car is falling apart well after 100k miles anyway.
And your claim that ignoring brake fluid for 100K miles is OK is complete nonsense. Over time, brake fluid becomes contaminated with moisture which does two things. First, it corrodes the caliper pistons to the point they will become immobile. The same thing will happen to the master cylinder and the clutch slave cylinder, if so equipped.
Further, accumulated moisture in the calipers will turn to steam when the brakes are hot and the pedal will get very soft to the point of brake failure. You have likely never driven on a track but I can tell you that it can and does happen.
Another failure point in old neglected cars is the brake hoses. When they get old, the inner lining can occlude, just like your coronary arteries, and when you release the pedal the brake fluid cannot flow out of the caliper and so the brake remains applied leading to overheating or in extreme cases, fire.
Mercedes has always recommended brake fluid changes each two years which I have followed and have never had a brake repair other than pads.
My Porsche is nearly 27 years old with never a brake problem because I change the fluid.
And your claim that ignoring brake fluid for 100K miles is OK is complete nonsense. Over time, brake fluid becomes contaminated with moisture which does two things. First, it corrodes the caliper pistons to the point they will become immobile. The same thing will happen to the master cylinder and the clutch slave cylinder, if so equipped.
Further, accumulated moisture in the calipers will turn to steam when the brakes are hot and the pedal will get very soft to the point of brake failure. You have likely never driven on a track but I can tell you that it can and does happen.
Another failure point in old neglected cars is the brake hoses. When they get old, the inner lining can occlude, just like your coronary arteries, and when you release the pedal the brake fluid cannot flow out of the caliper and so the brake remains applied leading to overheating or in extreme cases, fire.
Mercedes has always recommended brake fluid changes each two years which I have followed and have never had a brake repair other than pads.
My Porsche is nearly 27 years old with never a brake problem because I change the fluid.
A cursory search will confirm even minute quantities of moisture dramatically reduces brake fluid’s vaporization (boiling) temperature, to say nothing of contributing to costly premature caliper replacement. Renewing the fluid is always toward the top of my track day preparation checklist. A soft or nonexistent pedal could prove deadly. Never mind that 4maticbenz posts videos of his car going 130-MPH on public highways.
MB furnishes excellent brake hardware as delivered. It’s foolhardy not to maintain the performance and designed-in safety features for which we’ve already paid.
And your claim that ignoring brake fluid for 100K miles is OK is complete nonsense. Over time, brake fluid becomes contaminated with moisture which does two things. First, it corrodes the caliper pistons to the point they will become immobile. The same thing will happen to the master cylinder and the clutch slave cylinder, if so equipped.
Further, accumulated moisture in the calipers will turn to steam when the brakes are hot and the pedal will get very soft to the point of brake failure. You have likely never driven on a track but I can tell you that it can and does happen.
Another failure point in old neglected cars is the brake hoses. When they get old, the inner lining can occlude, just like your coronary arteries, and when you release the pedal the brake fluid cannot flow out of the caliper and so the brake remains applied leading to overheating or in extreme cases, fire.
Mercedes has always recommended brake fluid changes each two years which I have followed and have never had a brake repair other than pads.
My Porsche is nearly 27 years old with never a brake problem because I change the fluid.
Last edited by 4maticbenz; Mar 20, 2011 at 05:46 PM.
A cursory search will confirm even minute quantities of moisture dramatically reduces brake fluid’s vaporization (boiling) temperature, to say nothing of contributing to costly premature caliper replacement. Renewing the fluid is always toward the top of my track day preparation checklist. A soft or nonexistent pedal could prove deadly. Never mind that 4maticbenz posts videos of his car going 130-MPH on public highways.
MB furnishes excellent brake hardware as delivered. It’s foolhardy not to maintain the performance and designed-in safety features for which we’ve already paid.
Last edited by 4maticbenz; Mar 20, 2011 at 05:47 PM.
I should have stated that most other manufactuers do not recommend it as part of their maintenance schedule; is their brake fluid any better?? I think not.
Last edited by 4maticbenz; Mar 21, 2011 at 04:49 PM.
To each his own , enjoy you Benzes!!!
To each his own , enjoy you Benzes!!!








