Mercedes ECU Up for sale is a Working, in excellent condition Mercedes Engine ECM / ECM fuel / engine control module. Bosch Part number-- A0205451132 0261204116 / A 020 545 11 32 / 0 261 204 116 . - Should fit most C E & S-class models in 1997 with the 6 cyl engine.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. Bargain price alert here, on a hard to find ECU! Comes with a 30 day functionality warranty.