Beamseed Metal with Leather Car Remote Key Cover Case for Mercedes Benz W211 W203 W204 W210 AMG Class A B C E S ML GL CLA CLK C180 E200 Accessories Keyring (Black)

I've had no problems using the touch locks, or push button start, with this cover on. It's the only cover I could find that fully covers the fob.

The material is very nice and the key fits in like a glove. However, these keys work out of radio frequency and infrared. The metal is too thick for the key signal to be seen by the car. Literally have to walk all the way to the door to lock and unlock with the key fob. This means the infrared signal is not very strong because of the case metal. I would do an open or clear front of the case where the key would go into the ignition. Also, the metal blocks the radio frequency which allows the car to detect the key. I was inside the car with the key in my pocket and the car couldn't detect it which wouldn't allow me to start. I had to pull the key out of my pocket and then the car sees it. I took the case off and had none of these issues. I can unlock and lock the car from about 50ft away and when I get in it it recognizes the key like it should. It's a good looking product but not very functional. I would buy another after the bugs are fixed.

I am not able to use key less entry with this covering.. It will not allow my one touch door lock and unlock and key less start to work.