They lied didn’t work for my car

Perfect ! Works good

Work perfectly

Very easy to install and saved a lot of money over dealer replacement

These KeylessOption brand replacement shells for Mercedes keyless entry car remotes fit perfectly. The entry open and lock buttons as well as the trunk button all work fine (see my notes below regarding the panic button). Pressing the buttons is a little harder than normal but I kind of like the sturdier feel of the replacement shell compared to the original. The replacement shell also fit perfectly into the ignition on my Mercedes. You can actually check that on your ignition with the empty replacement shell before doing the change out. If you have two remotes that need replacing this is the better deal than purchasing two of the single shells. You don't have to use the metal manual keys if you don't need them. However I recommend using these new provided battery compartments since they are molded to fit the new shell perfectly. You could use your old battery compartment if you choose but I am not sure if it will fit as perfectly as the replacement for the new shell.You remove the battery holder from your old shell and then proceed to remove the circuit board from the old shell. I have several of these Mercedes keys. One of them just slid out of it's old shell without any problem by carefully inserting small needle nose pliers into a tiny metal opening on the circuit board and simply pulling out the board. There are YouTube videos showing how a step by step instruction for this removal. Be careful not to grab in the wrong place or clamp excessively hard or you can damage the board when you do this.The other Mercedes key had a slightly different circuit board design that did not have an area to insert the needle nose pliers. The circuit board seemed fixed in place and could not easily be removed with this method. There are videos showing how to remove the circuit board from the shell using other methods if you happen to have this other design. You can use a thin small flat head screwdriver or a flat thin nail file, envelope opener, etc. to create a gap between the board and the shell. Then you can use a small paper clip bent with a hook on the end to pull on the plastic strip holding on to the circuit board (you will understand this part when you view the videos). Just be careful not to damage the circuit board during this process. When I did this I ended up pulling off one of the tiny surface mounted buttons from the board. I had to pay $12 to an electronics repair shop that works on car keyless remotes to have the tiny button soldered back on to the board but everything ended up working fine after the repair.There is also a destructive method video where you basically cut the entire shell away from the circuit board. I wouldn't recommend this method unless you are really careful because you can just as easily damage the circuit board doing it this way since the shell becomes deformed and puts pressure on the circuit board in the process. But for some this method is still an option as opposed to the paper clip option.Another possibility is to simply pay an electronics repair place that works on car remotes such as Mercedes brand remotes to do all the work for you. Just assure yourself they actually know what they are doing before you leave your old car remote with them. The repair place I went to actually wasn't familiar with my Mercedes remote so it was good I did the replacement shell myself.In conclusion I highly recommend using these replacement shells as opposed to paying the hundreds of dollars for a new remote from a dealership. You won't have to worry about the fit and function of these shell replacements with the battery compartment. Just be extremely careful if you only own one remote with the design that is more difficult to remove the circuit board. One final note is regarding some users claim that the "panic button" doesn't work. I noticed that also with my key using the replacement but I also noticed that the "panic button" wasn't working on my other two Mercedes keys with the standard shells and yes all the other buttons and functions worked fine. I can't say for sure if they ever worked because I never use the panic button on these remotes. Obviously this is an issue that isn't related solely to the replacement shell. Check your panic button function for your standard shell before you use the replacement so you will know if it's an issue albeit in my opinion a minor one. Overall these replacement shells work great! It's not really that difficult or time consuming to do the replacement. Watch the videos, take your time, be patient and you will save hundreds in the process.Update: I realize the harder buttons of these replacement shells are an issue for some people but sometimes it's worth a $350 cost per new fob in savings to simply take a few minutes and improvise with an easy solution. The new shells just need to be worked in before installing the old circuit board. BEFORE you install the circuit board from the old fob into the new shell you can use the blunt plastic handle end of a screwdriver to press down hard on all of the main buttons of the new shell (open door, close doors and open trunk. I woudn't bother with the panic button). Do this over and over and hold the buttons hard for a minute or two when you do this. You can press the empty shell buttons to test for how much you have softened them. If they need more work just keep pressing and holding to gradually stretch the newer shell plastic button's until you get the feel you want.I will add a warning that you could over force this part and there is some risk you could damage the new plastic but I pressed down extremely hard on those new shell buttons over and over for a long time (a few minutes) and they turned out fine. I've been using my new shells for almost a year and they are still working great... and the new shell buttons actually have more of a soft button press feel than my older original worn out OEM fob shells did.