Mercedes FBS4 Ignition Switch Diagnostic

Send-in diagnostic evaluation for a Mercedes FBS4 ignition switch (EIS/EZS). $150 whether the data is good or bad. Diagnostic evaluation only; cloning is not guaranteed or included. Round-trip shipping is selected and charged separately at checkout.

$150.00

Description

FBS4 ignition switch diagnostic

Send in your Mercedes-Benz FBS4 electronic ignition switch (EIS/EZS) for a bench evaluation of the switch and its data before proceeding with cloning.

The diagnostic fee is $150 whether the information is good or bad. The fee covers the diagnostic work and applies even if the data is corrupted, unreadable, or unsuitable for cloning. Successful data recovery or cloning is not guaranteed.

This purchase is for the diagnostic evaluation only. Any cloning, repair, replacement switch, or additional work will be discussed separately after evaluation.

Round-trip shipping

Select your round-trip shipping option at checkout. Shipping is charged separately and covers sending the ignition switch to us and returning it to you after evaluation.

Include your order number, vehicle VIN, and a brief description of the problem with your securely packed ignition switch. If we have already discussed your 2014 FBS4 switch, you can use this page to check out. Otherwise, contact us to confirm the switch is FBS4 before ordering; model year alone does not confirm compatibility.

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Jesse Delaney

September 3, 2026

Wife’s C300 stranded her in the Costco gas station, the car suddenly failed to start! After much testing & trouble shooting I fortunately found this place!!! The ESL failed and Michael absolutely has the fix. Not only with the video’s but when you call, you get a call back! I took out the Ignition and sent it and the key and just as promised, I got them and the Emulator back, put it all in and it’s never going to happen to her again! I only gave it 5 Stars because I couldn’t do 6!

Dave Kotasenski

August 26, 2026

There has only been a few times I received service as excellent as this. I was able to identify the issue I was having with my Mercedes from his YouTube step by step instructions. Once I contacted him the response was immediate and informative. I mailed the part from P.A. to C.A. on Sunday and received back on Wednesday morning. As soon as I plugged it in and turned the key my car started. Through Micheals instructions he was able to help me from making a simple mistake of my steering column locking up and that would have cost thousands. Its a fantastic and great service and I am so appreciative. This was a E S L reprogram on a 2008 Mercedes C3000

Lee Addington

August 21, 2026

This is a great shop. Run by actual people. Many sites do not list a physical address or give you any confidence that you are going to get a solution to your aging Mercedes. All problems fixed and helped through the process. Thanks MBS!

Ernie De la torre

July 20, 2026

Awesome

Robert Mysn8ke_FL

July 6, 2026

If you are looking for the best service on repairing your ECU, these are the people for you !!! Call them from Florida on Friday morning. Mailed off my ECU Wednesday night to California. And received it back on Friday morning, fully reprogrammed and repaired.

Zayd

June 19, 2026

I have a 2010 ML350 that was having an intermittent starting issue. I took out the EIS (Electronic Ignition Switch) and sent it to them. I know that these issues can be expensive but they did it for a much better reasonable price. They tried a basic fix but the unit was too broken. Once I received the cloned replacement, the engine started right up but I got an anti theft lockout on the radio. I messaged them and they told me it was an issue that happens on some ML's. They paid for shipping and I quickly sent it back out. The same day they received it, a new replacement was shipped out. Within the week, I received the replacement. Just installed it and now the car is starting with no more anti theft warnings and the electronic trunk hatch is working once again! (It was not operating when the EIS was out). Was so satisfying to get it working for such a reasonable price. These guys are blessed with talent and were able to do wonders for my 2010 ML!

Dan Jason

April 7, 2026

The service that Michael provides is so valuable. I was quoted 3500 to fix my EI/ESL and was able to fix it myself with Michaels instructions and parts for around 900 including shipping. It only took a few days to get the parts back! My Mercedes would still be sitting if this service want available. Thank you Michael!

Patriot Automotive

March 12, 2026

BTM, Benz Tech Modules is an anomaly in today's world. A group that actually exceeds their claims and truly delivers a completely tremendous product with unsurpassed quality in ALL regards. I have been in the automobile repair business for almost 54 years and BTM is one of the few vendors that has impressed me at every juncture. Please use them and their products with absolutely no apprehension. Michael and Crew are the best !!!

Mercedes FBS4 Ignition Switch Diagnostic

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Description

FBS4 ignition switch diagnostic

Round-trip shipping

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