Mercedes ECU Up for sale is a Working, in excellent condition Mercedes Engine fuel control module. For the M104 engine Bosch Part number-- 0 261 200 420 (0261200420) , mercedes part number-- 013 545 73 32[09] . This ECU came out of a 94 C280. 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. Unit is used, & comes with a 30 day functionality warranty