Mercedes W140 CCM Control unit -

140 820 00 26

Up for sale is a Working, Mercedes control module - 140 820 0026 Check the part number off your original.  May fit even many models/years, but as always your best bet is to match the part number to the one on your CCM. 

 This unit controls a multitude of electrical components in the car (not engine related)

These units now have to be special ordered from most dealers new, list price is OVER $800! Not here... You probably won't find one cheaper anywhere. This comes with a 30 day guarantee.