P0206 on Mercedes-Benz: Causes, Symptoms and Fix Cost
Quick Answer
Safe to drive (short-term)
P0206 on a Mercedes-Benz means the engine computer detected an electrical fault in the cylinder 6 injector circuit: an open circuit, a short or a resistance out of range. Only engines with six or more cylinders can set it. On an inline-six cylinder 6 is the last cylinder, next to the gearbox, and on a V6 it is always on bank 2. A workshop wiring repair usually costs about 65-220 EUR; a petrol injector fitted about 100-310 EUR.
- Severity
- Moderate · Fuel System
- Typical repair cost, all makes
- €5-€650
Connect a standard OBD2 adapter (Bluetooth LE on iPhone) to your Mercedes-Benz and Skanyx tells you what P0206 means on that engine, whether it is safe to keep driving, and what the fix should cost. Free on iPhone and Android.
Get Skanyx freeWhat does P0206 mean on a Mercedes-Benz?
The Quick Answer above is the generic definition. What follows is the model-specific detail for the Mercedes-Benz models that log P0206.
Mercedes C-Class
2007-2024
V6 petrol (M276) and V6 diesel (OM642) C-Class variants have a cylinder 6. The OM642 diesel uses costly common-rail injectors with calibration codes that must be written via XENTRY or a workshop after replacement. Petrol variants usually fault from a corroded connector or chafed harness.
What causes P0206 on a Mercedes-Benz?
Beyond the generic causes listed on the main P0206 page, these are the patterns noted for Mercedes-Benz models:
Common-rail injector with calibration coding on OM642 V6 diesel
: Mercedes C-Class
Connector corrosion or harness chafe on M276 V6 petrol
: Mercedes C-Class
How to diagnose P0206 on a Mercedes-Benz with OBD2
- Read P0206 and the freeze frame with Skanyx. P0306 (cylinder 6 misfire), P0276 or P0277 (cylinder 6 injector circuit low or high) and a bank 2 lean code are the usual companions
- Find cylinder 6. On an inline-six it is the last cylinder, at the gearbox end, which on longitudinal engines such as BMW's and Mercedes' sixes puts it right against the bulkhead. On a V6 it is on bank 2: the rearmost cylinder of that bank on engines numbered one bank first (Ford, Audi), or one of the even-numbered cylinders on engines that alternate sides (Toyota's 2GR V6 has 2, 4 and 6 on bank 2)
- On a longitudinal inline-six, access at the bulkhead end is tight and the connector is hard to see, so remove covers and check the latch, pins and the harness branch with a light rather than by feel
- Measure the injector coil with the ignition off and compare with the figure for your engine. Then measure from the ECU pin for injector 6 so any break in the harness shows up
- Swap injector 6 with a neighbour on the same rail: cylinder 5 on an inline-six, or the next cylinder on bank 2 of a V6. If the code moves, replace the injector; if P0206 stays, repair the wiring or have the ECU driver checked
- Fit new PTFE combustion seals whenever a direct-injection injector comes out. On common-rail diesels such as the OM642 or N57, a replacement injector must be coded to cylinder 6 with a brand tool or at a workshop
- If P0206 is one of several injector codes, test the shared supply fuse, relay and grounds first
How much does P0206 cost to fix on a Mercedes-Benz? (EUR)
Estimated repair costs for P0206 in EUR, compiled across makes. Expect Mercedes-Benz parts and labour towards the upper end of each range.
| Repair | Parts Cost | Labor Cost | Total Estimate | DIY Difficulty |
|---|---|---|---|---|
| Cylinder 6 connector or wiring repair (DIY) | €5–€30 | €0–€0 | €5–€30 | Moderate |
| Cylinder 6 circuit diagnosis and wiring repair (shop) | €5–€40 | €60–€180 | €65–€220 | Professional |
| Cylinder 6 injector replacement, petrol (shop) | €40–€150 | €60–€160 | €100–€310 | Moderate |
| Cylinder 6 injector replacement with coding, common-rail diesel (shop) | €150–€400 | €100–€250 | €250–€650 | Professional |
Prices estimated as of October 2026. Costs vary by region, vehicle, and shop.
Codes related to P0206
These codes are often seen alongside P0206 or point to related issues, on any make:
Looking for the full P0206 reference (all makes, full diagnosis flow, complete repair cost matrix)? See the main P0206 guide