Mercedes-Benz W126 Cruise Control Unit [ECU]. OE Part Number A0035450932. Removed From A Running 1986 500 SE – Please Check Against Your Chassis Number Before Purchasing. Hundreds Of W126, W201 & W124 Parts, Please See Other Listings Or Contact Me For Any Items. Please Ensure This Item Is Suitable For Your Vehicle Prior To Ordering. If You Are Unsure, Send Me A Message & I Will Do My Best To Assist.