Mercedes SD Connect C4
The classic Xentry interface
What Is SD Connect C4?
SD Connect C4 is the classic interface within the SD Connect family used in Mercedes' official diagnostic chain. Paired with Xentry, it acts as the vehicle-to-PC bridge during diagnostic, coding, and programming sessions.
C4 is still frequently preferred for many W204 / early W212 jobs. In very new, DoIP-heavy fleets, C5/C6 may stand out — the final decision depends on your vehicle fleet.
Connection instability is commonly reported with counterfeit/clone units; sourcing from an invoiced supplier matters.
See sd-connect-c4-or-c5-c6 for the comparison to help you choose.
Why Is C4 Still Talked About?
Practical — model verification is required
Mature Fleet
Widespread experience in older/mid-era Mercedes fleets.
Xentry Compatibility
A natural fit within the official workflow.
Budget
Often discussed as more accessible than the newer generation; verify current pricing.
Supply
Can be evaluated through Nitro Bilişim.
Frequently Asked Questions
Is C4 enough on its own?
No. You also need Xentry, current data, a stable PC/network, and the correct cables.
Does C4 do DoIP?
DoIP support depends on the model/firmware/software combination. C5/C6 is more often recommended for newer DoIP fleets.
Price/stock?
Contact Nitro Bilişim for current information.
SD Connect C4 — Workshop Notes
Firmware and Xentry handshake problems are frequently reported with clone C4 units; prefer invoiced sourcing.
A missing cable set can make a device seem broken. Check the OBD and special cables.
If your fleet is heavily new DoIP, plan for C5/C6 as well (mercedes-sd-connect-c5-c6).
Mercedes-Benz Solutions with Nitro Bilişim
C4 remains a valid interface for many Mercedes workshops. Plan it alongside mercedes-sd-connect-c5-c6 and mercedes-xentry. Consult Nitro Bilişim.
Keywords: SD Connect C4, Mercedes C4, Xentry C4, SD Connect Turkey
