Mercedes Key Replacement via EIS (Mail-In)
Lost your only Mercedes key? Ship us your EIS — we program a fresh working key directly on the bench.
Sending several modules? Add them all — one box, one return-shipping charge.
Pre-2014 Mercedes with EIS/EZS (W204, W212, W221, W164, W251)
How It Works
Three simple steps. Hundreds of mail-in jobs completed for shops, locksmiths, and DIY pros.
Pay & Get Address
Click "Order Now", pay securely online. We email shipping address + instructions within minutes.
Ship Your Module
Pack per the instructions and ship to Arlington. USPS goes to our PO Box; UPS and FedEx must use the street address. Your prepaid inbound label arrives by email — shipping to us costs you nothing.
Get It Back Fast
Work typically completed within 24 hours of receipt. Ships back next business day at the return speed you chose at checkout — standard to overnight. Tracking emailed.
What You Get
- Cut + programmed Mercedes key (HU64 or chrome key blade)
- EIS returned with key paired
- All-keys-lost supported
- Typical 24-hour turnaround after EIS is received
- Return shipping your choice at checkout — standard, 2-day, or overnight
- 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
- All keys lost
- Need a spare key (still requires EIS shipping)
- EIS replaced — key pairing required
Will This Fix My Problem?
Honest answer: here's exactly what this service fixes — and what it doesn't.
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
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.
We buy and email you a prepaid inbound label, so shipping it to us costs you nothing. Return shipping is selected and paid at checkout — Standard $29.95 (3–5 days), UPS 2-Day $54.95, or UPS overnight $94.95. 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
Auto Module Lab
If shipping USPS
PO Box 120241
Arlington, TX 76012
If shipping UPS or FedEx
1009 Oakwood Ln # 120241
Arlington, TX 76012
Your prepaid inbound label (already addressed) arrives by email the moment you order; the return label is bought when your module reaches the bench and ships on the speed you chose at checkout.
Need to perform this job remotely?
Get an Auto Module Lab Remote Programming Kit and have our technicians program supported vehicles from your shop — the car stays on your lift and nothing gets posted.
Buy the interface once — program with us anytime. Supported procedures vary by vehicle, module, OEM software and security requirements.
Frequently Asked
Still have a question? Text us — replies in 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 Services
Other bench services for the same brand or use case.
Mercedes EIS Cloning (Pre-2014)
Failed Mercedes EIS leaving you with a car that won't start? We clone it to a replacement EIS — your existing keys keep working, no re-keying the car.
Mercedes ELV Emulator Programming
ELV (steering lock) failed? Ship your EIS — we program and supply a matched ELV emulator.
Mercedes W164/X164/W251 EIS Repair
ML/GL/R key won't turn, or the EIS is dead? We repair (not clone) the original EIS on Mercedes 2008-2012 DAS3 infrared systems — your keys keep working.
Fault codes this service fixes
Seeing one of these on your scan tool? Here's what it means and how the bench fix clears it.
Guides & tools for this fix
Deeper symptom walkthroughs and the programming tools behind this service.
Where we serve Mercedes Key Replacement via EIS
Mail-in means nationwide — we accept modules from all 50 states and DC from our Arlington, Texas lab. See your state, metro, or specific vehicle:
All 50 states + DC
Ready to ship?
$150 flat, typical 24-hour turnaround. Pay now, get the shipping address by email, drop it in the mail. Your module is typically back on your bench within a week.