A-Class to Sprinter · EIS specialists · Keys, fobs, programming & ignition repair at your location
From the A-Class and C-Class to the Sprinter van, Mercedes-Benz is one of the most common premium makes on UK roads — and Royale Car Keys handles the full range of Mercedes key, ignition, and EIS work on-site. Lost your only key, need a spare, got a car that won’t recognise its key, or facing an EIS ignition fault? We come to you, sort it at the roadside or on your driveway, and get you moving again — without the main-dealer wait or price tag, 24 hours a day.
From £79
Keys & repairs
No call-out fee
Pay on completion
2-year warranty
Parts & labour
~30-min response
London & South East
We offer a full range of mobile Mercedes-Benz services. Whether you need a spare, a replacement for a lost key, programming, or an electronic ignition repair, we handle it at your location.
Lost, stolen, or broken your only Mercedes key? We supply and program a new key for any model, from older chrome keys to modern keyless-go fobs — including "all keys lost" jobs. See our lost car key replacement service.
A spare Mercedes key is a sensible, lower-cost backup — far cheaper to arrange while your original still works than after it’s lost. We cut and program spares on-site. See our replacement car keys service.
Every Mercedes key needs pairing to the car’s security system to start the engine. We program Mercedes keys — including infrared chrome keys and keyless-go smart keys — with dealer-grade equipment, so only your new key works.
Worn buttons, a cracked case, or a dead remote don’t always mean a new key. We repair Mercedes fobs — and replace the battery or re-house the electronics — on-site. See our key fob repair service.
Many Mercedes use an electronic ignition switch (EIS/EZS) instead of a mechanical barrel. When it fails, the key isn’t recognised, the car won’t start, or the key won’t turn or come out. This specialist repair starts from £250. See our detailed Mercedes EIS failure guide.
On models that still use a mechanical ignition, a key that won’t turn or sticks is usually a worn barrel. We repair or replace it and cut a matching key on-site. Not sure if your car has a mechanical barrel or an EIS? Just call. See our ignition barrel repair service.
Two of the most common Mercedes faults we’re called to: a key that won’t turn (usually a worn barrel or worn key) and a key that isn’t detected by the car (an immobiliser, transponder, or programming issue). We diagnose which it is on-site and fix it — whether that’s an ignition repair, a re-programme, or a new key.
We supply, cut, program, and repair keys for the full Mercedes-Benz range, including:
Cars
Vans
If your Mercedes isn’t listed, just call — we cover models not shown here too.
Mercedes-Benz has used several key systems over the years, and we handle them all:
Mercedes main dealers are among the most expensive places to replace a key or repair an ignition — and they’ll usually want the car brought in and left with them. We do the same work at your home or workplace, with dealer-grade equipment, typically at a fraction of the dealer price. For an EIS fault in particular, where a dealer may push a full module replacement, we’ll diagnose the actual problem and explain your options honestly before any work.
We’re usually with you within 30 minutes — call for a price before we set off.
Mercedes vans are vehicles we’re called out to often, and for a working van every hour off the road costs money. Lost keys, worn ignitions, and key-not-recognised faults are all common on higher-mileage Sprinters and Vitos. We carry the equipment to cut and program Mercedes van keys and sort ignition faults at your location, so your van is back on the road the same day wherever possible.
Mercedes key prices depend on the model and key type — an older transponder key is simpler and cheaper than a keyless-go smart key for a new C-Class or GLC. We’re typically well below main-dealer prices and we come to you. Every quote includes the call-out and labour and is confirmed before we begin — no hidden extras.
A few things affect the exact price: the type of key (chrome infrared, keyless-go, or transponder), the cutting and programming involved, your model and year, and whether it’s a mechanical barrel or an EIS fault. See our full pricing page, or call with your model and year for an accurate quote.
We provide mobile Mercedes key, ignition, and EIS services across Greater London, Kent, Essex, Surrey, and Sussex — including London, Dartford, Maidstone, Bromley, Croydon, Grays, and the surrounding towns. See our service area page for the full list, or just call and we’ll confirm we cover you.
A spare or replacement Mercedes key starts from £79, depending on your model and key type. We confirm the full price, including call-out and labour, before we start — usually well below main-dealer cost.
The EIS (Electronic Ignition Switch, also called EZS) is the module that reads your key and lets the car start. When it fails, the key isn’t recognised, the car won’t start, or the key won’t turn or come out. We diagnose and repair EIS faults on-site, from £250. See our Mercedes EIS guide.
Yes. "All keys lost" is a job we do on Mercedes — we program a new key from the vehicle, so you don’t need an existing key. We’ll need your V5C or proof of ownership and photo ID.
Yes. We program Mercedes chrome infrared keys, keyless-go smart keys, and older transponder keys using dealer-grade equipment, at your location.
Yes — Mercedes vans are common jobs for us. We cut and program van keys and sort ignition faults on-site, so your van is back on the road quickly.
No. We’re fully mobile and come to you — at home, at work, or at the roadside. We don’t tow your vehicle.
Lost key, won’t start, or an EIS fault? Call 07777 676261 now or message us on WhatsApp for fast, mobile Mercedes-Benz key, ignition, and EIS services across London and the South East.