Lost Your Mercedes Key?
Lost Your Mercedes Key?
Mobile specialist key programming at your roadside, home, or workplace.
Check Your Model Below To Confirm Vehicle Coverage.
Avoid expensive main dealer towing fees and weeks of waiting. We use advanced diagnostic tools to program high quality Mercedes-Benz infrared keys securely at the roadside.
Select your Mercedes model and year to see which key services are currently available.
Don't see your model? We may still be able to help. Contact us with your registration and we'll check it for you.
Results are a guide only. Coverage can depend on the exact model, year, ignition system and vehicle specification. We always confirm before booking.
CarsUnlocked provides an expert mobile auto locksmith service engineered specifically for Mercedes-Benz passenger cars and commercial vans. Running specialized diagnostic and infrared key-cloning configurations straight out of our mobile service van, we solve your transponder issues immediately—right where you are parked.
“Absolute life saver. Lost the single key to my Mercedes Sprinter van in Honiton during deliveries. Rob arrived fast, bypassed the locks cleanly, and programmed a new electronic key on the spot. Genuine 5-star service.” – Local Fleet Review
Our Mercedes Auto Locksmith Services


Ensure you are never stranded. We duplicate and sync functional FBS3 infrared keys cleanly without altering vehicle modules.


Keys locked inside the cabin or boot? We pick Mercedes mechanical locks damage-free—fully applicable up to 2026 vehicle models.


Worn buttons, dead tracking cells, or shattered structural fobs? We rebuild casework and save your original circuit electronics.
What East Devon Drivers Say
EXCELLENT Based on 66 reviews Posted on Google David MorlTrustindex verifies that the original source of the review is Google. If you need a locksmith look know further. When you talk on the phone he knows his stuff.He was very honest with me. He doesn't put money on the bill unnecessarily .I would recommend him for any work going forward.Posted on Google Isabella Williams-HamTrustindex verifies that the original source of the review is Google. Excellent service! I lost my only car key and was really stressed, but Rob arrived quickly, unlocking my vehicle and providing me with two new keys. Rob was professional, friendly and explained everything clearly. The price was fair and there was no damage to the car. I would definitely recommend this service to anyone that loses a key to their vehicle or even just needs a spare. Thank you for your help!Posted on Google Andrew TilleyTrustindex verifies that the original source of the review is Google. Rob was great and turned up very quickly late Sunday afternoon. - really prompt, efficient and reasonable. Really nice guy. Highly recommended!Posted on Google Margaret WilsonTrustindex verifies that the original source of the review is Google. Needed a spare key for my car. I was very pleased with the service Rob provided: quick, efficient and competitive and would call him again for any key problems.Posted on Google Jack MorleyTrustindex verifies that the original source of the review is Google. Rob was awesome. A seemingly simple new spare car key came with mysteries and challenges, Rob persisted, researched, tried and tried again. He didn't stop till the problem was solved. He communicated efficiently and courteously throughout, and stuck to his quote despite the complications. Don't waste your time with anyone else, Rob will get it done. I'll definitely be going back to him for my locksmithing needs.Posted on Google Beverly LoveTrustindex verifies that the original source of the review is Google. Rob was very easy to deal with & very polite, explaining everything. I have no hesitation in recommending him/his business. Once the appointment was made he arrived at my place of work on time, phoning first. I experienced a problem a week later, (nothing caused by my new keys!) But Rob took his time to assist me & point me in the right direction to resolve my issue - even checking in on me later in the day to see if everything was OK. Now that's what I call 10/10 customer service.Posted on Google Dakar Audio ClubTrustindex verifies that the original source of the review is Google. Rob came out on a sunday , persevered with a tricky lock and got me back on the road - good comms and trustworthy- recommendedPosted on Google mia mooreTrustindex verifies that the original source of the review is Google. 10/10 service! Rob was amazing and committed to helping my get into my car. Brilliant servicePosted on Google ZamTrustindex verifies that the original source of the review is Google. Genuine person, saved me money by fixing the current lock instead of putting a new one in. Would highly recommend. 5*Posted on Google Wave42Trustindex verifies that the original source of the review is Google. Rob was fantastic today! Very quick to arrive and got us back on the road in no time! We would definitely recommend! Thanks so much!
Mercedes Key Services: Frequently Asked Questions
We specialize in Mercedes-Benz FBS3 (infra-red electronic keys), supporting iconic platforms like the W204 C-Class, W212 early E-Class, W906 Sprinter, and W639 Vito vans. Use our coverage tool above to trace your model range. For newer dealer-locked FBS4 configurations (typically 2014/2015+ depending on model), we provide emergency lockout entry services only.
When modifying a working vehicle setup, cutting the auxiliary backup blade and safely mapping a secondary infra-red key through our diagnostics setup takes roughly 25-45 minutes directly at your location.
Yes. Choosing CarsUnlocked avoids steep main dealer markups and completely eliminates recovery flatbed costs. Our localized services average **30% to 60% less** than standard franchise dealer quotes.
Never. We use professional lock-picking sets and specialized vehicle entry equipment designed to bypass inner catch mechanisms safely. We guarantee zero structural scuffs, paint damage, or lock damage during a mobile lockout.
For supported FBS3 models (such as the W906 Sprinter or W639 Vito), we can establish complete key recovery on-site. We safely read lock lines and map a new operational code without soldering to your ignition assembly. This process typically takes between **1 to 2 hours** depending on the specific vehicle variant.
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