M279 Improvements Backward Compatibility
Junior Member
Joined: May 2021
Posts: 31
Likes: 4
From: Dallas
2005 SL65 AMG, 1987 560SL
Still no issues. I even used the tube a few months ago when I changed the trans fluid and it worked fine and the dipstick went in it without any problems.
The bracket that’s about half way down the tube is not connected on my car, I’m not sure if that makes any difference. At some point a mechanic must have been working on the car and never reattached it and I’ve left it that way.
You absolutely need to vacuum bleed the system when you are finished. Good luck with the job!
also, these pliers make the job soooooo much easier
The bracket that’s about half way down the tube is not connected on my car, I’m not sure if that makes any difference. At some point a mechanic must have been working on the car and never reattached it and I’ve left it that way.
You absolutely need to vacuum bleed the system when you are finished. Good luck with the job!
also, these pliers make the job soooooo much easier
Thanks for the pliers advice.
Eric
Junior Member
Joined: May 2021
Posts: 31
Likes: 4
From: Dallas
2005 SL65 AMG, 1987 560SL
Still didn't get the time to make the changes. What are you guys using for a cooling fluid mixture is it 50/50, I have read on some forums, not specific Mercedes, that some people use a higher percentage water, reasons mentioned are that the pump can do a better job circulating a lighter mixture.
What are your experiences? does anybody know what the Mercedes recommended mixture is? (I'm in Texas)
Also I saw a video on youtube (
) with a intercooler fill on a Maybach, a little bit more modern vacuum pump and improved procedure but basically the same process, so just another confirmation regarding your bleeding systems.
Eric
What are your experiences? does anybody know what the Mercedes recommended mixture is? (I'm in Texas)
Also I saw a video on youtube (
Eric
Super Member
Joined: May 2019
Posts: 671
Likes: 288
From: Omaha, NE
2007 S600
I'm running 50/50, or close to it. I need winter protection down to at least -20, preferably lower. I don't think any different mix is going to make a measurable difference in effectiveness. If you live where you never see freezing temperatures, you could run straight water with a wetting agent... but then you're giving up the corrosion protection of the coolant for the advertised (not tested or proven in your car) corrosion protection of the wetting agent.
People often get wrapped up in theoretical marginal improvements. The pump should be more effective with a lighter mixture? Maybe. But would it be more effective by any measurable amount, let alone enough to be of any practical value? I'd love to see some actual flow testing. And in the case of our intercoolers, there would have to be a BIG difference in cooling to make any detectable difference in the performance of the car.
So, the short answer -- Mercedes says to run 50/50, I run 50/50.
People often get wrapped up in theoretical marginal improvements. The pump should be more effective with a lighter mixture? Maybe. But would it be more effective by any measurable amount, let alone enough to be of any practical value? I'd love to see some actual flow testing. And in the case of our intercoolers, there would have to be a BIG difference in cooling to make any detectable difference in the performance of the car.
So, the short answer -- Mercedes says to run 50/50, I run 50/50.
Member
Joined: Apr 2020
Posts: 97
Likes: 34
Exige S | V70R | CTS-V wagon | JKUR | 13 S65 (Mocha/Armagnac)
I'm running 50/50, or close to it. I need winter protection down to at least -20, preferably lower. I don't think any different mix is going to make a measurable difference in effectiveness. If you live where you never see freezing temperatures, you could run straight water with a wetting agent... but then you're giving up the corrosion protection of the coolant for the advertised (not tested or proven in your car) corrosion protection of the wetting agent.
People often get wrapped up in theoretical marginal improvements. The pump should be more effective with a lighter mixture? Maybe. But would it be more effective by any measurable amount, let alone enough to be of any practical value? I'd love to see some actual flow testing. And in the case of our intercoolers, there would have to be a BIG difference in cooling to make any detectable difference in the performance of the car.
So, the short answer -- Mercedes says to run 50/50, I run 50/50.
People often get wrapped up in theoretical marginal improvements. The pump should be more effective with a lighter mixture? Maybe. But would it be more effective by any measurable amount, let alone enough to be of any practical value? I'd love to see some actual flow testing. And in the case of our intercoolers, there would have to be a BIG difference in cooling to make any detectable difference in the performance of the car.
So, the short answer -- Mercedes says to run 50/50, I run 50/50.
Super Member
Joined: May 2019
Posts: 671
Likes: 288
From: Omaha, NE
2007 S600
Hahaha... it would certainly be a thin market, wouldn't it? I keep wondering if I should buy one of those little OBD widgets they sell all over eBay for $29 that guarantee massive HP/TQ gains AND better mileage just by plugging it in... 
150 Horsepower Gain is Very Easily Felt.
145 lb-ft Torque Increase Greatly Boosts
Hill Climbing and Acceleration From Low Speeds
6 Miles Per Gallon Boost Saves Gas and Fuel Costs.
150 Horsepower Gain is Very Easily Felt.
145 lb-ft Torque Increase Greatly Boosts
Hill Climbing and Acceleration From Low Speeds
6 Miles Per Gallon Boost Saves Gas and Fuel Costs.
Junior Member
Joined: Jul 2018
Posts: 36
Likes: 4
From: Seattle
CL600, ML550, SL65
Greetings:
I hope I'm not too late to get a little help with this project. I'm doing the R12 to R134 adapter change to facilitate bleeding. I'm a bit confused as to which schrader valves need to be removed. My adapters will not go on unless I remove the valve in the intercooler pipe. I bought the R134 valves but no matter wheter they are open or closed I cannot blow any air through them. I must not understand some details here. Some help would be great.
Dave
I hope I'm not too late to get a little help with this project. I'm doing the R12 to R134 adapter change to facilitate bleeding. I'm a bit confused as to which schrader valves need to be removed. My adapters will not go on unless I remove the valve in the intercooler pipe. I bought the R134 valves but no matter wheter they are open or closed I cannot blow any air through them. I must not understand some details here. Some help would be great.
Dave
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