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MB W211 E-Class engine control unit complete 2711537379 Siemens 5WK90499 
Product information "MB W211 E-Class engine control unit complete 2711537379 Siemens 5WK90499 "
For sale here is an original Mercedes Benz MB W211 E-Class engine control unit.
The engine control unit is in very good condition. Everything worked great until the expansion. It will be completely sold as seen in the picture. So control unit, key with ignition and the control unit itself.
All electrical functions are fully in order.
Part number of Mercedes Benz: 271 153 73 79
Part number from Siemens: 5WK 90499  SIM4L KE ER
Please note the part number. Fits on some MB models.