The camshaft adjuster solenoid (which is related to the variable valve timing system) may fail or timing chain/balance shaft components may wear, resulting in illumination of the Check Engine Light and various drivability issues. Mercedes-Benz has released a service bulletin outlining specific repair instructions depending on fault codes stored.
Resources for the Repair and Maintenance of your 2012 Mercedes-Benz S550
2012 Mercedes-Benz S550
2012 Mercedes-Benz S550 Problems
2012 Mercedes-Benz S550 Recalls (Recent)
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Due to a manufacturing defect, a crack can develop on the fuel filter when the vehicle is operated in high temperatures. This crack can result in a fuel leak, increasing the risk of a fire. Dealers will replace the fuel filter to correct this concern.
2012 Mercedes-Benz S550 Questions and Answers
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2012 Mercedes-Benz S550 Reviews
I bought my 2012 S550 on Oct 2012 and noticed the car was pulling to the right while driving on a flat road. I took the car to dealership to fix this alignment problem three times and the problem was not completely fixed. Last time when I brought the car back to dealership, the shop foreman told me that all S550s have the same problem that pull to the right. He even let me test drive another new S550 in which I experienced it pull to the right worse than my S550. I am wondering are other 2012 S550 owners experience the same problem.
500 miles into the new benz and now the engine light comes on -__- i thought european cars were good