Mercedes ECU Up for sale is a Working, in excellent condition Mercedes ECU. Bosch Part0 280 800 274 (0280899274) 006 545 94 32 (0065459432). This ECU came out of a Mercedes W 126 420SEL. and May fit other models/years too, but as always your best bet is to match the part number to the one on your original ECU. This is one of the most common causes of no start or random stalling problems with these jetronic ECU cars. If yours does not have this problem, keep an extra ECU in the trunk, you might some day be glad you did... These units now have to be special ordered from most dealers new for big $$ (often times over $1000!), and finding a good one second hand is getting to be a chore. This unit offers a 30 day refund or replacement warranty.