: Mercedes ceases R1234yf use- hint; the ATS/XTS use 1234yf



M5eater
05-19-13, 12:05 PM
So I did do some searching and didn't see this mentioned, so I figured I'd go ahead and post it up.

R1234yf is the new freon that's supposed to replace R134a.

All appeared well until Daimler decided to perform some additional testing in high-speed crash situations.

The results? In every scenario with the new refrigerant, the cars caught on fire.

http://www.dailymail.co.uk/news/article-2307265/EPA-nominee-tough-questions-approved-new-car-air-conditioner-refrigerant-caused-ENGINE-FIRES-Mercedes-Benz-tests.html

http://www.motorauthority.com/news/1081180_mercedes-benz-investigating-refrigerant-that-caused-ball-of-fire

http://www.motorauthority.com/news/1079672_2013-mercedes-benz-sl-class-recalled-due-to-flammable-refrigerant

GM still uses this stuff in the XTS/ATS and says depsite the concerns, their internal testing has provided it's still 'safe' and will continue to roll it out on all their new vehicles within the next few years.

http://macsworldwide.wordpress.com/2013/01/04/gm-to-stay-with-r-1234yf/

Hoosier Daddy
05-19-13, 12:23 PM
the ATS/XTS use 1234yf
I think you are wrong about the 2013 ATS, at least the North American version. Do you have something that contradicts the article below?

From: http://www.sae.org/mags/aei/11870/ (late February, 2013)


The only vehicles on sale in the U.S. with R-1234yf are the Cadillac XTS and Honda Fit electric vehicle (EV). A Cadillac ATS installation was changed to R-134a when a noise problem surfaced on the 2.0-L turbo, caused by compressor vibration resulting from the expansion valve setting selected for R-1234yf and proximity of the compressor mount to the front engine mount

M5eater
05-19-13, 12:50 PM
I think you are wrong about the 2013 ATS, at least the North American version. Do you have something that contradicts the article below?

From: http://www.sae.org/mags/aei/11870/ (late February, 2013)

Not that I'm aware of. It's good to know only a few ATS's have this stuff.

thebigjimsho
05-19-13, 12:56 PM
Don't crash, genius.

pragmatic
05-20-13, 06:26 PM
Mercedes does not want to lock into a Honeywell DuPont proprietary refrigerant. They are moving to CO2 which will cost more to design (higher pressures) but at least the chemical is not controlled by one company. I would not worry too much about flammability. But using flammability to knock a DuPont product serves them right after the lobbying they did to keep HC refrigerants from being used to substitute for R12. The whole refrigerant market and its regulatory environment stinks from over spending by the large chemical companies trying to lock the market into their products.