This module ECU is a genuine OEM Mercedes-Benz part with terminal type OEM and terminal quantity 1. It is a control unit engine control module for various models including W219 CLS500 CLS550, W220 S430 S500, W215 CL500, W209 CLK500, W211 E500, and R230 SL500 SL600. The manufacturer part number is 1131531091 / A1131531091 / A 113 153 10 91 1091 and it is also interchangeably known by its OE/OEM part numbers A1131535479, A1131534479, A1131533079, A1131532779, A1131539679, and A1131534879. This module ECU is a reliable and efficient component for your vehicle. It has been superseded by genuine OE OEM original Mercedes-Benz parts and is suitable for front and right placement on the vehicle. Purchase this high-quality ECU from eBay Motors to ensure the proper functioning of your engine control module.