When did MB introduce 134a?
 

What was the first year that Merecedes-Benz started using 134a a/c refrigerant as origional equipment? 1994?

I called the MBUSA 800 (1-800-for-MERC) number with that very question when I was shopping for a new used car; the guy said that '92 and newer have the 134a refrigerant. they are amazingly helpful and knowledgeable at that number.
-Tom

Yes, I remember seeing a '92 124 car with R134.

Have a great day,

My 92 300E has R12. I believe when the law passed it took effect the 93 model year, even though some companies began sooner. Mother's 92 Volvo has R12, but a friend's 93 Volvo has R134. My 300E has a very slight leak I believe, but after a charge is working beautifully. Plan to have it repaired over the winter, and will probably convert over then due to the fact it's around $60 a lb here in Dallas. Found it for $35 a lb in Arkansas, but not worth the drive really.

Our '92 300 had R12 in it... now converted.

MB has changed many things in mid-model year. It could be that this change came DURING the '92 model year. The only way you will know about this particular car is to look.

The first 1992 MB with R134a was the W140 chassis, the W124(except V-8's) & R129 chassis got R134a in 1993. The 400E & 500E did have R134a in 1992. The W201 chassis never got R134a from the factory.

Either my memory is not correct and it was a '93 or I wasn't paying close attention and it was a conversion.

Have a great day,

My 93 300E2.8, which I purchased new in December, 1992, had R134a from the factory. Still got the car, never been recharged or added to.

92 400E R134 from factory

My '92 (6/92 build date) 500E got 134a as factory fill. As did my 7/92 300D 2.5 turbo.

FWIW