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M
p0300
Moderate
Mercedes-Benz · Sedans
Random/Multiple Cylinder Misfire Detected
Quick Answer
Error code P0300 on your Mercedes-Benz Sedans means: Random/Multiple Cylinder Misfire Detected. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
W177W206W214V297A220 2024A220 4MATIC 2024AMG A35 4MATIC 2024AMG C43 4MATIC 2024AMG C63 S 2024AMG E53 4MATIC+ 2024AMG E63 S 2024AMG EQS 53 2024AMG S63 E 2024C300 2024C300 4MATIC 2024E350 4MATIC 2024E450 4MATIC 2024EQS 450+ 2024EQS 580 4MATIC 2024Maybach S580 2024S500 4MATIC 2024S580 4MATIC 2024W223
Likely Causes
  1. Worn or fouled spark plugs
  2. Failing ignition coil packs
  3. Vacuum leak causing lean condition
  4. Low fuel pressure or clogged injectors
  5. Worn timing chain causing valve timing issues
How to Fix It
1
Check freeze frame data to identify which cylinders are misfiring most frequently
2
Inspect and replace spark plugs if worn or fouled
3
Swap ignition coils between cylinders to isolate a faulty coil
4
Perform a compression test on all cylinders to rule out mechanical issues
5
Inspect the timing chain for stretch using a timing chain measurement tool
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Spark plugs
Ignition coil packs
Timing chain kit
Fuel injectors
Related Error Codes
P0171P0174P0410P0420P0455
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