My original KLIMA relay had the contacts welded on the compressor relay, which ultimately fried the compressor when it ran out of refrigerant (it was UGLY). The replacement KLIMA relay has been working, but the kickdown has never worked properly and the A/C cutout microswitch wouldn't disconnect the compressor, even though the wiring and switch were good. Both functions work now. It's hot today, so I plan on testing the A/C on the highway after getting off work. Hopefully no more rapid-cycle.

It is worth noting that the ELR/EDS will not fix a rough/lumpy idle caused by mechanical problems. If the engine runs rough with the EDS solenoid disconnected, it's gonna run rough with it connected as well. If it smoothes out with the EDS solenoid unplugged, it's likely to be issues in the EDS computer contributing to the shake.

My idle is not perfectly smooth and never has been, but now that the EDS computer is serviced, any roughness I have is completely ignorable, I've been at a couple stop lights where I thought the thing died, but was still running fine, just without the familiar stomach-jiggling shake!

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Current stable:
1995 E320 157K (Nancy)
1983 500SL 125K (SLoL)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)

Gone and wanting to forget:
1985 524TD 167K (TotalDumpster™) [Definitely NOT a Benz]