2024 Mercedes-Benz P0305: What It Means & Is It Safe to Drive?
P0305 on the 2024 Mercedes-Benz: Cylinder 5 Misfire Detected. Here's what it means, what usually causes it, what repairs typically cost, and whether it's safe to keep driving.
What this code means
Misfire on cylinder 5—present on V6, V8, and inline-5 engines only. On V6 engines, cylinder 5 is sometimes harder to access; factor labor into repair estimates.
Common causes on the 2024 Mercedes-Benz
- Fouled spark plug
- Failed ignition coil
- Leaking or clogged injector
- Low compression from valve or ring wear
Symptoms
- Check Engine Light
- Engine shaking or rough idle
- Power loss under acceleration
Typical fixes
- Replace spark plug and coil on cylinder 5
- Test and replace injector if needed
- Compression and leak-down test
Repair cost range
For a 2024 Mercedes-Benz, repairs for P0305 typically fall between $150 and $1000, depending on the root cause and labor rates in your area.
Known issues on Mercedes-Benz
Mercedes M272 P0305 on rear-bank cylinder 5 typically means a failed ignition coil. If balance shaft timing is confirmed good, replace the coil cassette for the rear bank. On the M272, replacing the rear-bank cassette requires intake manifold removal.
Most commonly affected models