Thanks for the replies. The SRS (supplimental restraint system) box is dead center on the trans hump behind the radio. Mine clicks badly and you can hold your hand on it and feel it. I've read that on other years/models, the SRS box is under the floor mat on the passenger side. I read on this forum that mine is in the center as I describe it. I'm hoping that I read wrong and that it is my climate control box but so far no one seems sure about it.

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Andy
71 350SL (sold), 81 380SEL, 84 300D (just sold), 85 190D (sold), 91 300E, 93 190E (just sold), 79 240D (sold) , 83 240D (living on in my other cars) an 83 380SEL (sold) 82 380 SL and 85 300D. Just bought a 95 SL500.