Mercedes Electrical Repair & SCN Coding London

Mercedes Electrical Repair, Coding & SCN in London

We handle Mercedes electrical faults, control-unit coding and Xentry online SCN calibration — including new key programming, replacement-module coding, retrofits and parameter changes — as an authorised Xentry subscriber.

Price: From £85 for simple coding. Complex EEPROM work quoted separately. Typical time: 1–3 hours

Electrical faults on a modern Mercedes live in software as often as in wiring. If a module has been replaced on your car, it almost certainly needs SCN coding against Mercedes' online database before it will work. That is a specialist job and we do it every day.

SCN coding explained

SCN (Software Calibration Number) coding is Mercedes' way of making sure a replacement module has the exact parameters for your specific VIN. Without it, a brand-new control unit will throw faults and refuse to work. We connect to Xentry online and handle it properly.

Common jobs

New key coding, replacement ignition switch coding, ESP/ABS pump coding, EZS (ignition control) coding, injector coding, retrofit activation (reversing camera, Apple CarPlay on compatible head units, heated steering wheel).

What's included

Xentry / Star access
Online SCN coding via Mercedes servers
New key programming
Retrofit coding and activation
EEPROM work with specialist partner where needed

Common symptoms we see

Car not recognising new key
Replacement module not working
Reversing camera fitted but not activated
Intermittent electrical gremlins after a repair

Frequently asked questions

What is SCN coding and why does my Mercedes need it?

SCN (Software Calibration Number) coding writes the correct parameters for your exact VIN into a replacement control module. Without it, a new module will throw faults and often refuse to work. We do it online via Xentry.

How much does a new Mercedes key cost?

Costs vary by model, but typically £200-£450 for the key plus the Xentry programming charge. We can quote for your exact VIN.

Which Mercedes retrofits can you activate?

Reversing cameras on compatible head units, Apple CarPlay / Android Auto activation on NTG 5.5 and later, heated steering wheel, comfort-close and many MBUX feature activations. Ask us for your specific VIN.