Mercedes ML / GL / R-Class EIS Repair (W164 / X164 / W251 — 2008-2012)
Repair (not clone) the original EIS on Mercedes ML/GL/R 2008-2012 DAS3 infrared system.
Mercedes W164 (ML), X164 (GL), W251 (R) — 2008-2012 (DAS3 infrared EIS)
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 via Stripe. We email shipping address + instructions within minutes.
Ship Your Module
Pack per the instructions and ship to our Arlington workshop. USPS or UPS — your choice. Customer pays shipping to us.
Receive in 1-2 Days
Work completed within 24 hours of receipt. Ships back next business day. Return shipping included, tracking emailed.
What You Get
- Component-level repair of the failed EIS (no donor required)
- Original VIN binding + key pairing preserved
- Full bench-test with your supplied working key
- No additional ECU or ESL re-programming needed after install
- 24-hour bench turnaround
- Return shipping included
- Photo of completed bench-test before shipping back
Compatibility
Confirm your part matches one of the variants below before ordering. Not sure? Text us a photo and we'll verify.
ML-Class (W164)
GL-Class (X164)
R-Class (W251)
EIS part numbers
Will This Fix My Problem?
Honest answer: here's exactly what this service fixes — and what it doesn't.
Fixes:
- ✓Key inserted but ignition won't turn
- ✓No dashboard illumination when key is inserted/turned
- ✓Cold-weather intermittent failure (often progresses to permanent)
- ✓"Remove key" message stuck on cluster
- ✓Engine cranks intermittently — sometimes works, often doesn't
- ✓Existing keys recognized inconsistently
Won't fix:
- ✗All keys lost (no working key to bench-test against)
- ✗EIS physically destroyed (water immersion, crush damage)
- ✗Failed ELV/steering lock motor — see our ELV Emulator service
- ✗Pre-2008 W164 (different EIS architecture)
Repair vs Clone — which do you need?
If your EIS is failing but you HAVE a working key, repair is almost always the right call: cheaper, faster, and you keep your VIN-bound module (no donor sourcing headache). If you've lost ALL keys, you need our EIS Key Replacement service instead. If you have a working key but want the certainty of a known-good donor unit, our EIS Cloning service applies. Text (817) 586-9634 with year/model + symptoms if you're unsure.
Shipping Instructions
These details are also emailed to you the moment your payment clears.
You pay shipping to us. We cover return shipping back. Pack the EIS in static-protected padding — it's a small, valuable module.
What to include in your box
- The EIS unit (removed from the steering column area)
- AT LEAST ONE working key for bench testing
- Printed order confirmation
- VIN + odometer reading
- Your name, return address, and phone number
Ship to
Auto Module Lab
1168 W Pioneer Parkway
Arlington, TX 76013
Frequently Asked
Still have a question? Text us — replies in minutes.
How is this different from your EIS Cloning service?
Do I need to send a key?
What if no keys work at all?
Will I need to re-pair the ECU or ESL after install?
What if my EIS is from a different chassis (W204, W211, W221)?
Why is the repair more expensive than the cloning?
Related Services
Other bench services 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 Key Replacement via EIS
Ship us your Mercedes EIS — we program a fresh working key directly on the bench.
Mercedes ELV Emulator Programming
ELV (steering lock) failed? Ship your EIS — we program and supply a matched ELV emulator.
Where we serve Mercedes W164/X164/W251 EIS Repair
Mail-in means nationwide. See your state, metro, or specific vehicle:
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.