BenzWorld Junior Member
Date registered: Mar 2010
Vehicle: C Class Estate 270, ML 320 (previous;A-Class, C-Class 200k, CLK 320, SLK 350)
Location: Doncaster UK
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Smart Key Replacement shell - it's so easy
Problem was the membrane on the key for my W203 was breaking up but its the same key on many MB models.
£200 for a new MB one or DIY was the dilemma.
Tried my luck and bought a virtually new fob from eBay for £11.00 including postage.
Decided to swap the electronics from duff key to replacement which took exactly 30 seconds and I have not done this before.
All you need is a lipped small screwdriver as found in those "sets of small tools" many DIY stores for working on mobile phones etc.
Process is take out the battery section of the key.
Push in your lipped screw driver as shown in the picture and using only moderate pressure to push back the white tab on the white plastic locking spacer just pull and out comes the whole PCB.
Do the same on your original key and push into replacement key and battery and off you go.
No programming, no expensive trip to a MB dealer.
Pictures explain it visually.
Last edited by PhilAllam; 03-31-2010 at 06:52 AM.