Ok folks...I got back to the 240D this weekend. Here the results of the tips. (1) When I jump across the low pressure switch, the compressor does not kick in. (2) There is 12V at the compressor with the controls set for the A/C to come on, and no voltage at the compressor when the A/C controls are set for the A/C NOT to come on. (3) Switching the relays doesn't result in any change and (4) A jumper wire across the relay socket as Gene suggested to try also did not cause the compressor to kick in.

Since when the controls are set for A/C, there is 12V at the compressor leads but the compressor does not pull in, does this mean the clutch and/or entire compressor is bad? Can a clutch be an intermittent problem? Thanks for you continued help.

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85 300D 107K present
82 240D 190K present- next-to-slowest car I ever owned
81 240D 1995-2000- slowest car I ever owned
79 350 SE Euro 1996-2001- fastest car I ever owned