If there is pressure and black seals are failing You need to change copper washers as well as You're getting an air leak from injector nest and this is why black seals are failing
2008-Present Audi Q5
For Mercedes-Benz GLK-Class X204 2013-2015 250 4-matic SUV
Actuator Included: With Actuator
(Will Not Fit Electric /RS /ST Model)
4x Turbo Coolant Hose Line for Mercedes CLS550 GL550 E550 S550 GL450 2011-2018 Hyundai EGR Valves & Parts If there is pressure and4x Turbo Coolant Hose Line for Mercedes CLS550 GL550 E550 S550 GL450 2011 2018 Feature: Direct replacement to your original unit. All products shipped are tested. Easy and Direct Replacement. ProFessional installation is recommended Specifics: Condition: Brand New Manufacturer Part Number: 2782000800, 2782000900, 2782001300, 2782000051, 2782001851 OE OEM Part Number: A2782000800, 2782000800, A2782000900, 2782000900, A2782000051, 2782000051, 667 564,