My 1999 E300D AC with 52k miles stopped Saturday. The Climate control was working in the auto mode when I punched the recirculate button to remove cabin odors. A couple of minutes later and the AC stopped working and the EC (economy) light came on and the compressor stopped. I am almost positive I did not touch the EC button. I can not get the EC light to go off so the compressor will come back on. Any suggestion's would be appreciated and comment if Mercedes will pick up the bill. Mercedes had the control unit out of the car at about 35K because of a temp problem. Thanks for your suggestions.