The '93s all had R-134, and so did '92 models with v8 engines.

I find the 134 cars to be at least as reliable as the earlier r-12 cars. MB upgraded to dual electric fans with a full shroud and moved to a larger displacement nippondenso compressor. A/C performance is very strong in these cars. My 300E 2.8 blows so cold it can be uncomfortable - this in 100 degree heat.

Anecdotally, my 1993 just now requires its first a/c service and repair. The expansion valve has developed a slow leak, so it need to be replaced. Other than that, the a/c has worked great for the last 12 years, and has never required any attention.

- JimY