Review on High-Quality Gas Cap Replacement for Mercedes - Benz C CL CLS E G GLK S SL SLK and More - 2214700605 Fuel Tank Cap Assembly by Sharmake Shuram

After several attempts the Check Engine light came on because of this gas cap, indicating that the "gas cap was off". I had to go back to my native gas cap. This new cover has only 1 spring inside instead of 2 springs. The second spring should press on the membrane. The OEM Mercedes Benz cap has two springs inside and the second spring is on the one-way exhaust valve diaphragm. This makes the gas cap a truly vented cap. The car's computer can tell the difference. DO NOT BUY THIS ITEM HERE!