2012 Mercedes-Benz S550 4.6L Turbo
..We still do have an engine noise when cold, that sounds like a bad Air Injection pump, but the car doesn't have an Air Injection pump. The noise will happen in the first 60 seconds with the engine stone cold then it goes away. It's coming from the right side...
Summary posted 8/14/2018
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Vehicle Data2012 Mercedes-Benz S550
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Message Closed w/Summary
Vehicle Data
2012 Mercedes-Benz S550
VIN | WDDNG7DB2C |
Engine | 4.6 L / 8 cyl / GAS |
Trans | 7-speed Automatic (Electronic) |
Delivery | Fuel Injection |
Affected | Turbo |
Conditions | Cold |