• Mercedes-Benz EIS EZS Repair Service W164 X164 W251 W216 W221 2165450108 1645451408 , 1645451608 , 1645451908 , 1649050200 , 1649051600 , 1649051500 , 1649051500 , 2169050000 , 2165450108 , 2215450508
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Mercedes-Benz EIS EZS Repair Service W164 X164 W251 W216 W221 1649051500

Mercedes-Benz EIS EZS Repair Service W164 X164 W251 W216 W221 1649051500

$399.00 USD
$399.00 USD
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Electronic Ignition Switch (EIS or EZS) Repair Service

We support all A164, A216, and A221 part numbers, found in the following models:

W164 Mercedes ML-Class** (ML320, ML350, ML550, ML63 AMG)
X164 GL-Class** (GL350, GL450, GL550, GL63 AMG)
W251 R-Class** (R320 CDI, R350, R550, R63 AMG)
W216 CL-Class** (CL550, CL600, CL63 AMG, CL65 AMG)
W221 S-Class** (S350, S450, S550, S600, S63 AMG, S65 AMG)

Common part numbers: 
2165450108 1645451408 , 1645451608 , 1645451908 , 1649050200 , 1649051600 , 1649051500 , 1649051500 , 2169050000 , 2165450108 , 2215450508, 2215451208 
A1645451808 1645451808 A2169050000 1649050100

Common Electronic Ignition Switch (EIS/EZS) failure symptoms on Mercedes vehicles include:

1. No Ignition Power (Terminal 15 Issue): The engine may fail to start or turn over, often due to a lack of ignition power reaching the necessary circuits.
  
2. No Communication with Vehicle Modules: The EIS may fail to communicate with the car’s other systems, resulting in error messages or the inability to start the car, as the key and EIS cannot properly exchange information.

3. Failure to Recognize the Key: If the EIS fails to recognize the key, either because of a malfunction in the key recognition system or an issue with the EIS itself, the car will not start. You may hear a "no key" or "key not detected" warning.

4. No IR/Coil Activity: The Infrared (IR) or coil signal used to read the key’s electronic information might not be working. This can prevent the car from detecting the key and, as a result, prevent starting.

5. Immobilizer Activation: A malfunctioning EIS can cause the immobilizer to stay active, even with the correct key inserted, which prevents the engine from starting.

6. Intermittent or Inconsistent Starting: The vehicle may start intermittently or not start at all, even though the key appears to be working properly. This could indicate a problem with the EIS or key programming.

7. Dashboard Warning Lights: A faulty EIS may cause warning lights on the dashboard, such as the “EIS error” or "Immobilizer" light, or the car may not start and display a “Start Error” message.

8. Key Won’t Turn in the Ignition: In some cases, the key may physically get stuck or fail to turn in the ignition, indicating a mechanical or electrical failure in the EIS.

 

2008-2009 Mercedes GL 320
2010-2012 Mercedes GL 350
2008-2012 Mercedes GL 450
2008-2012 Mercedes GL 550
2008-2009 Mercedes ML 320
2008-2011 Mercedes ML350
2010-2011 Mercedes ML 450
2008-2011 Mercedes ML 550
2008-2011 Mercedes ML63 AMG
2008-2009 Mercedes R 320
2008-2012 Mercedes R 350

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Getting Started

Start a request

Open a request in MavConnect, our customer portal, and tell us the vehicle, the module and what it's doing. A technician reviews it and sends your Technical Review — the price and the shipping instructions — in writing. Accept it, ship the module with any carrier (USPS, FedEx or UPS), and write your request number on the box.

WHAT'S COVERED

A technician looks first

Every request starts with a $195 Technical Review: a technician checks your part number, codes and photos against this service and confirms it's the right call before you ship anything. Go ahead with it and the $195 comes off your price. Want the module measured on the bench before we work on it? Add bench evaluation when you submit — $195 per hour, and you'll know the hours before we start.

WHAT TO EXPECT

Turnaround & warranty

✓ Turnaround: stated in your Technical Review and counted from the day your module reaches our bench.  

✓ Warranty: six months on rebuilds and programmed replacements, when installed by a licensed shop.

✓ Programming: your module comes back with its own programming — plug in and drive. Programmed to your VIN — plug in and drive"

About ECU Maverick — ECU Repair, Rebuilding & Programming Specialists

ECU Maverick rebuilds, programs and clones control modules for European, domestic and specialty vehicles. Based in Fort Myers, Florida, we work with independent shops, dealerships and vehicle owners nationwide — by mail.

Where most shops replace and reprogram, we work at the board level: our technicians rebuild the circuits that fail, bringing back modules others write off. That comes from years of reverse engineering and bench work across thousands of control units.

Vehicles We Service

We specialize in European automotive electronics — BMW, Mercedes-Benz, Audi, Porsche, Land Rover, Bentley, Ferrari, Lamborghini, Maserati and Aston Martin — and also service domestic vehicles, heavy-equipment control modules and marine electronics.

Why Shops and Owners Choose Us

Price in writing first — Your Technical Review gives you the exact price before you ship. No surprises, and the $195 comes off your price when you go ahead.

Plug-and-play ready — Rebuilt modules keep their programming; replacements are programmed to your VIN. No dealer visit.

A technician, in writing — Every answer comes from the technician who has your file, on your request in MavConnect. You can read it twice, share it with your shop, and come back to it a year later.

Six-month warranty — On rebuilds and programmed replacements, when installed by a licensed shop. Full terms on your request.

Our Commitment

We exist to keep your vehicle out of the dealership and back on the road — a technician's honest answer, a price in writing, and the same care we'd give our own car, from the first message to the day the module is back in your hands.