The power window relay on the 190E 2.6 is reallly warm. Just for a comparison I looked up the wiring diagram for both the 190E 2.6 and the 300SDL and they have same setup for the power seats except the SDL has seats memory. The power seats relay on the SDL is not warm at all and according to both wiring diagrams its hot at all times. I know something is wrong with the power seats on the 190E but not quite sure what could be causing the relay to be really warm on the 190E and cool to the touch on the SDL. Any ideas?

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1986 300SDL, 211K,Dealership serviced its whole life
1991 190E 2.6(120k)
1983 300D(300k)
1977 300D(211k)