Mercedes ECU Up for sale is a Working, in excellent condition Mercedes Engine fuel control module. Bosch Part number-- 0 261 200 440 /  015 545 74 32 
. This ECU came out of a 94 w140 chassis Mercedes S320 that was recently insurance totaled due to crash damage.  The car still ran fine. May fit other models/years, but as always your best bet is to match the part number to the one on your original ECU. These units now have to be special ordered from most dealers new for big $$ (often times several thousand bucks!), and finding a good one second hand is getting to be a very hard chore. 

Get a great used one here for little money!