Mercedes Key Replacement via EIS (Mail-In)
Ship us your Mercedes EIS — we program a fresh working key directly on the bench.
Pre-2014 Mercedes with EIS/EZS (W204, W212, W221, W164, W251)
How It Works
Three simple steps. We've completed hundreds of mail-in jobs for shops, technicians, and DIY owners across the country.
Buy & Receive Instructions
Click "Order Now", pay securely via Stripe. We email you the shipping address and step-by-step instructions within minutes.
Ship Your Module
Pack your module per the instructions and ship to our Arlington, TX shop. USPS or UPS — your choice. You pay shipping to us.
Get It Back in 1-2 Days
We complete the work within 24 hours of receipt and ship back the next business day. Return shipping is on us. Tracking emailed.
What You Get
- Cut + programmed Mercedes key (HU64 or chrome key blade)
- EIS returned with key paired
- All-keys-lost supported
- 24-hour turnaround after EIS is received
- Return shipping included
- 6-month warranty on programming work
Compatibility
Confirm your part matches one of the variants below before ordering. Not sure? Text us a photo and we'll verify.
Chassis supported
EIS versions
Service scenarios
Will This Fix My Problem?
Honest answer: here's exactly what this service fixes — and what it doesn't. Save yourself time and shipping cost before ordering.
This service fixes:
- ✓All Mercedes keys lost (pre-2014)
- ✓Need a fresh key after a failed dealer programming attempt
- ✓Replacement EIS needs a new key paired to it
- ✓Existing keys somehow erased from EIS
This service won't fix:
- ✗2015+ Mercedes (FBS4) — different system
- ✗EIS hardware failure (we program, not repair the EIS itself)
- ✗Steering lock (ELV) failures — see our ELV emulator service
Shipping Instructions
These details are also emailed to you the moment your payment clears.
You pay shipping to us. We cover return shipping. The EIS sits in the dash — pull the trim, disconnect the connector, ship the EIS only (no key required).
What to include in your box
- Mercedes EIS / EZS module
- A printed copy of your order confirmation email
- VIN of the Mercedes (for blade cut)
- Your name, return address, and phone number
Ship to
Not Your Basic Locksmith
1168 W Pioneer Parkway
Arlington, TX 76013
Phone: (682) 344-1957 · Hours: 24/7
Frequently Asked
Still have a question? Text us — we usually reply within minutes.
Do I need to send an original key?
What's the difference between this and EIS cloning?
Will my old keys still work?
Can you cut the key without the VIN?
How fast is turnaround?
Related Mail-In Services
Other services we offer for the same brand or use case.
Mercedes EIS Cloning (Pre-2014)
Clone a working Mercedes EIS to a replacement EIS — keeps your existing keys.
Mercedes ELV Emulator Programming
ELV (steering lock) failed? Ship your EIS — we program and supply a matched ELV emulator.
VW/Audi MED17/ME17 IMMO Delete + VIN
Permanently remove immobilizer coding from MED17/ME17 ECUs. Optional VIN correction.
Ready to ship?
Pay now, get the shipping address by email, drop it in the mail. Your module is back on your bench within a week.