The A/C compressor in the 1984 300DT has been in for awhile. I'm thinking since I'm going to do a complete hose rebuild, that perhaps I should look at changing out the compressor. Anyone have any experience with either Four Seasons or BEHR compressors?

Neither makes compressors, so I assume you mean rebuilds. I've used 4 Seasons many times, always with good results. The Nippondenso in my 190D was a 4S rebuld, and it's going strong after 10 years.

Mercedes compressors were made by York, GM or Nippondenso, depending on model and vintage.

"The only difference between our remans and a "New" compressor is the
outer casing." (SIC which doesn't get replaced)

__________________
'84 300SD sold
124.128

I would choose neither and go for a Sanden conversion.

BUT if you are keeping the R4, I would go Behr between your choices. I did use a new Compressor Works brand that was built in the USA, but the stepped ports would never seem to want to seal correctly.

Synthetic compressor oil would be a must to me with the R4.

__________________
I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]

Yours likely has a Harrison R4 (round pancake), which was also used in 1980-90's Chevy, so will be easy to source. It is hard to design a Sanden bracket, given the cantilevered mounting points. I had one on my 1985, but it cracked in several places after ~3 years. Look for an R-4 w/ O-ring grooves on the same level since probably seal better and the "seal rings" are confusing and harder to source. I wouldn't change it until it fails (usually by seizing on a hot day, are yours 108 F like today in Sacramento?). I have Hella PAO 68 oil in mine, which is claimed to work better (ref Duracool's "Oil Chill" marketing).

__________________
1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans

We are running mid 90s this week. I'm thinking of using the BG Frigi Quiet oil which also claims to be "better".