Could you send me his contact info? I'll give him a call/email and ask if he has the keyless go fobs.

 

Thank you nguyen.

 

@Davery I have been down this path several years ago. Summary: You have to research extensively (which you are involuntarily) and confirm everything more than once and ultimately in person. Except for an MB Dealer, I would pay nothing upfront and not send parts from your vehicle thru the mail. IMO, when someone does this, the "locksmith" has your key, ECU, VIN and knows your home address. Just spray paint your home security code on the side of your house to complete the package for him. Your first decision: Do you believe @johnfranciscog who has probably serviced 25,000 MB clients face-to-face or a commenter who knows-a-guy? Your Call. . Then, are you going to value advise from non-W212 owners in a W212 forum? MO: everything johnf.... states - I confirm. What he doubts, I have no opinion on. I missed your geography, but maybe these details may help you in no particular order: USA MB dealer prices varied a good bit on this issue in my area when i did this, some would not touch my 3rd party keyfob, about two years ago another forum member went thru this claiming no dealer keyfob. I called my dealer to help the forum member, but they only had 25 KG-KFs in stock and 5000 in stock in Texas. He didnt believe me because his dealer in another state not that far away could not help. Whatever. local locksmith who does SIMPLE, OLD auto keys, cut the spare hidden blade inexpensively. he sent me to an auto locksmith far away on automobile row that had about 5 full-time locksmiths and a greeter. Roughly: W212 - between 2009-2014 the systems changed, maybe more than once. At that time, he could solve your problem, but not mine. he knew the model years well. Other Non-W212, he could solve certain years, not not others. The MYs were NOT the same as the W212. That's why its confusing. This outfit knew their stuff. Unless you were a dealer, they only worked on private party cars with vehicle and owner onsite. elsewhere, many 3rd party locksmiths either said 'Yes' - because they want the business or 'No' because they know my car is in the transition zone of model years and they dont want to waste their time. In my case, I solved the hidden blade key issue first, quickly, independent locksmith, and inexpensively. I wanted to be able to physically unlock the car if needed. The KG-KF issue took longer, ultimately at a MB dealer. YMMV GL

 

I've found someone in Long Beach who claims that he can provide KG fobs and program them for my car. He's a little steep on the price but at least I can drive there and make sure everything works before I pay him. Maybe I'll take a ride after the rain stops.

 

Update?

 

Well if I was actually retired I'd have been able to simply drive up there and see if what he was claiming was true. Unfortunately, my "retirement" also includes babysitting grandkids (not mine, her's) taking them to Disney on Ice, Knott's Berry Farm and numerous other "duties as required" as we used to say. So I still am operating with just one key. Maybe this week. LOL

 

Maybe take the Grandkids to see Goofy........The Locksmith. ;-)) Nice drive along the coast. Goofy has an accent and drives a weird van, but he knows how to open doors. Seal the deal with an ice cream stop on the way back. Best Grandpa Award! Win-win.

 

Hey Colonel,
They'd love that, especially the ice cream part.
I found a local guy who came to the house, had the fob, programmed it for the car and only charged me $200 for the whole deal. It''s the "non keyless go" fob so it has to be put into the ignition module to start the car but it's a spare key so it will work. Kind of crazy that you either can't buy a new fob or you can only get them from a dealer for a grand with programming but an independent guy can do one for $200. Ah well. Time to go to see the Mouse

Joe

 

Aftermarket keyless go is working!!!! This is available pre 2015 models only. If you need one it will.cost you $500 (includes shipping in the US/Canada). You will need to ship your keys to me to make this work however. So sending it to me use fedex or something that you can trust. Takes 20min. for the car to recognize the key. After that....push away like typical original MB key. Price will include keycut as well.

 

I had an excellent experience with Allan and highly recommend his services for Mercedes FBS3 key programming.

My vehicle is a 2013 Mercedes-Benz S350 (W221) with factory KEYLESS-GO. After losing my original key, I needed a properly functioning replacement that would restore full passive entry and push-button start functionality.

After researching extensively, I drove approximately three hours to have the work performed in person — and it was absolutely worth it.

Allan immediately understood the FBS3 system architecture and confirmed the correct hardware requirements for a true Keyless-Go key.

The process was handled professionally from start to finish:

• No EIS removal

• No module disassembly

• Keys written properly to unused FBS3 tracks

• Full passive entry restored

• Door handle unlock works flawlessly

• Push-button start without insertion works perfectly

• Trunk proximity detection works

• Mechanical emergency blades provided

Everything now functions exactly as factory.

It was clear throughout the process that Allan has deep technical knowledge of Mercedes FBS3 systems (W204, W207, W212, W221, etc.) and understands the difference between standard infrared keys and true KEYLESS-GO hardware.

If you need proper Keyless-Go programming done correctly and cleanly, I would not hesitate to recommend him.

Allan (Northridge, CA)
(818) 208-0439
agent011@hotmail.com

Professional, knowledgeable, and detail-oriented.

 

Where are you located?

 

Reporting back, as requested.

Two fully functional KEYLESS-GO keys were successfully programmed for my 2013 W221 S350 BlueTEC (option 889 – KEYLESS-GO).

All factory passive entry features are fully restored:

• Door handle unlock (low-frequency proximity detection)
• Walk-up recognition
• Trunk proximity access
• Push-button start without inserting the key

No EIS removal.
No module disassembly.
No invasive procedures.
Keys were written properly to unused FBS3 tracks.

The vehicle now operates exactly as it did from the factory.

That fact alone establishes something important: the vehicle architecture never lost KEYLESS-GO capability.

Now let’s clarify what actually happened here.

There is a real hardware distinction between standard IR-only keys and true KEYLESS-GO keys at the circuit board level. This is not a coding toggle. It is not a dealership “enable/disable” setting. It is not a software switch buried in XENTRY. It is board-level differentiation involving low-frequency passive entry circuitry integrated into the key.

If the key does not contain the proper LF hardware, passive entry will not function — regardless of vehicle coding — even if the car is factory-equipped with option 889.

The fact that this distinction no longer appears in the dealership EPC parts catalog for certain VINs does not mean the hardware never existed or cannot be sourced.

It reflects OEM supply-chain policy — not engineering impossibility.

Dealerships operate strictly within Mercedes-Benz’s VIN-authorized parts catalog and backend cryptographic key provisioning system. They cannot source outside hardware. They cannot use aftermarket boards. They cannot generate keys independently. They cannot write FBS3 tracks without Mercedes’ centralized authorization structure.

It is also critical to understand how dealership-issued FBS3 keys are actually provisioned.

For FBS3-equipped vehicles like the W221, keys ordered through Mercedes-Benz are VIN-specific and pre-programmed at the central facility before shipment (Fort Worth / Daimler backend infrastructure). The immobilizer data, cryptographic pairing information, and assigned key track are written before the key ever arrives at the dealership.

The dealership does not generate the cryptographic data locally.
They do not remove the EIS.
They do not perform board-level programming.
They do not manually write key data.

The standard dealership workflow consists of:

• Verifying proof of ownership
• Ordering the VIN-assigned key
• Receiving the pre-coded key
• Inserting the key into the EIS for initialization/synchronization
• Confirming operation

That is not programming in the engineering sense.

It is initialization and synchronization of a pre-programmed key.

No EIS removal is required.
No dump reading is performed.
No key generation occurs at the dealership.

Therefore, when substantial “programming” labor charges are applied in such cases, it is reasonable for owners to question what portion of that charge reflects actual technical work versus administrative handling and dealership overhead — especially when the supplied key does not restore the vehicle’s original factory functionality.

If Mercedes-Benz no longer distributes a specific KEYLESS-GO board variant through official channels, then from the dealership’s perspective, it effectively “doesn’t exist.”

But that is a distribution limitation.

It is not a technical limitation of the vehicle.

In my situation, I was completely stranded in a rural area with no rental car agencies, no Uber, no Lyft, no taxi service — no transportation alternatives at all. I needed my vehicle operational immediately. The car was held for an extended period. Pricing escalated significantly before being reduced. I ultimately paid premium dealership pricing and received a replacement key that removed factory KEYLESS-GO functionality. I was informed that true KEYLESS-GO keys were no longer available.

From inside the dealership ecosystem, that statement may have reflected what their parts system allowed them to order.

From a technical standpoint, it was not accurate.

Independent FBS3 specialists are not constrained by Mercedes’ official parts distribution model. They can source compatible KEYLESS-GO boards and program them directly to unused FBS3 tracks using professional Mercedes tooling such as CGDI MB and similar platforms. The vehicle already supports option 889. The low-frequency antennas are present. The FBS3 immobilizer architecture supports passive entry. The system was designed for it.

The only requirement was the correct hardware.

That hardware exists.

It simply no longer exists inside the official Mercedes-Benz distribution pipeline.

That distinction matters — especially for owners of legacy Mercedes vehicles.

This experience exposes a broader structural reality of the modern luxury automotive business model.

Mercedes-Benz, like BMW and other German OEMs, has moved toward increasingly centralized control over:

• Parts distribution
• VIN-based hardware authorization
• Cryptographic key provisioning
• Diagnostic and coding access
• Software-controlled feature management

This vertical integration model protects brand control, security, and revenue streams. It ensures dealerships remain within a tightly managed ecosystem. However, it also creates a closed supply environment where certain hardware variants may disappear from official channels long before the vehicles themselves become obsolete.

When that happens, owners are often told that specific features are “no longer supported,” even though the vehicle’s engineering still supports them fully.

From a customer’s perspective, this has real consequences.

You can pay thousands of dollars for reduced functionality because the official supply chain no longer distributes the original hardware variant. You can be charged substantial “programming” fees for keys that arrive pre-programmed from a centralized facility. The dealership may be operating within corporate constraints, but the practical impact on the owner remains the same: diminished functionality at premium pricing.

In my case, the contrast between the dealership outcome and the independent specialist outcome was significant — technically, economically, and practically.

The dealership supplied a downgraded key at premium pricing while stating that true KEYLESS-GO hardware was no longer available. An independent specialist restored full factory functionality using proper hardware and proper tooling, without invasive work, and at a fraction of the cost.

For transparency, the two fully functional KEYLESS-GO keys were successfully programmed by Allan, an independent Mercedes FBS3 specialist in Southern California.

Allan – Northridge, CA
(818) 208-0439
agent011@hotmail.com

He understands FBS3 architecture, unused key-track allocation, and the board-level distinction between IR-only and true KEYLESS-GO hardware. The keys were written to unused tracks and fully tested on the vehicle before completion. No shortcuts. No cloning. No EIS removal. Full passive entry verified prior to finalization.

This was not hacking the vehicle. This was not bypassing immobilizer security. This was supplying the correct hardware to a system that was engineered to support it from the factory.

The larger takeaway for owners is this:

When a dealership says a feature is “no longer available,” that statement often reflects OEM distribution policy — not necessarily engineering reality.

When a dealership charges for “programming,” owners should understand how FBS3 VIN-specific keys are actually provisioned and what the technical workflow truly involves.

Understanding the difference between catalog availability and actual vehicle capability — and understanding the difference between initialization and true programming — is critical, especially for owners of older S-Class, E-Class, ML, GL, and similar FBS3-equipped vehicles.

In this case, KEYLESS-GO was absolutely viable.

It was never gone.

It was simply unavailable through the official dealership channel.

That is an important distinction.

Sharing this so that other owners who are told that KEYLESS-GO is “no longer available” — or who are presented with substantial “programming” charges for pre-coded keys — can make informed decisions and understand the difference between supply-chain restriction, technical capability, and administrative process.

 

Wow! I must commend you on your thorough and
meticulous post. In the time that this thread has been maturing, I’ve personally installed and coded a new aftermarket ISM (Intelligent Servo Module) into my transmission of my 2011 e350 wagon using the that I just purchased from eBay. I can’t believe that it actually worked.

It sounds like we’re walking down similar paths in regards to repairing these aging steeds. I understand what you’re trying to convey by juxtaposing what’s possible at the dealer and what can be done “unofficially”. I appreciate the level of detail in your post.

Congratulations on the new keys!

https://mbworld.org/forums/e-class-w212/925035-before-i-have-my-wagon-towed-dealero-need-help.html

 

Appreciate that — thank you.

And congratulations on the ISM install. That’s not a small job, especially coding it successfully. These cars are getting to the point where understanding the architecture matters more than simply ordering parts.

I agree — there’s definitely a growing gap between what the dealership catalog allows and what’s technically possible with the right tools and knowledge. It’s interesting to see more owners becoming comfortable working within that independent ecosystem.

At the end of the day, it’s about keeping these cars operating as engineered. They’re too well-built to lose functionality simply because of supply-chain policy.

Thanks again for the thoughtful response.

 

I have a 2014 E63 (W212) with DBS4 and have just lost both keys. Dealership says I need to have car towed to them and it will be about $1200 total for key and programming. Can you still help if I've lost both keys?

 

Vancouver, Canada

 

I was told you need to send the ignition lock.

 

Update to my situation. I got a from the dealership and in their process they disabled the other two keys (I assume because I told them they were both lost). Now, we have found one of the original keys. How can I get this original key to work again in my car? (2014 E63 AMG - DAS 4)

 

Go back to the dealer. Their choice is to add a fob or remove old fobs and add the new fob.

 

I will certainly do that. I didn't expect them to disable the originals. Thank you very much!