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2020 E 350; 2022 E450 Coupe; 2005 Porsche Cayenne; 1975 Porsche 911 Carrera 3.0
Replacement Key Fob Shell/Case
I thought I would share with the group my experience on replacing the outer shell/case of my 2007 W209 key fob
I will post the photos in sequential posts because I'm having trouble uploading them all at once.
As you can see in the first picture, the main issue with the key fob was the cracked panic button plastic. Pictured next to the old key fob was the replacement key fob shell that I bought off eBay for $15.88 delivered from China. Obviously the OEM shell is much better quality however first appearances were that the replacement shell from China was acceptable.
The Second photo will show this process in which to remove the electronics out of the original key fob. Gentle pressure in the direction shown is all you need, and the electronics will just slide out.
The third photo shows the valet key, the battery holder and the electronics along with the old and new key fobs.
The fourth photo shows the reassembled key fob next to the original key fob.
The fifth photograph shows the main problem I have with the replacement key fob. Though everything assembled back together, the battery holder does not snap in as tightly as the original. As a result pulling on the keychain will remove the battery pack from the key fob. In the photo you can see a little bit of play pointed out by the screwdriver.
The sixth photograph shows the heads of the two key fobs. The original one is on the right, you can see the difference in the design.
The play in the battery pack is a major drawback for me. As I stated earlier, if you pull with a little bit of force on the key ring you can separate the battery from the key fob. I may try to see if I can adjust this and improve it.
The moral of the story for $16 you get what you pay for
Last edited by RNajarian; Mar 29, 2016 at 01:13 AM.
I bought some Keys form Aliexpress when i had my CLK, they were actually pretty good, i just wanted them to last 6 months and i'd change them no problem (i think it was like 3 keys for 15$). But i had non of the issues you had. same key design front and back. Good lock on the exchanged parts and overall good finish. After exactly 6 months the Mercedes logo on the back became a little yellow so i changed the key again.
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