Mercedes ECU Up for sale is a Working, in excellent condition Mercedes control module unit. Bosch Part number listed at top . Fairly certain this fits most V8 W124 models. Cheapest one of these I could find new was over $2400. This one is used but works fine. A faulty ECU can cause a whole host of problems with these cars, and finding the correct part number unit is no small task. Unit comes with a 30 day guarantee.