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Mercedes-Benz · Sedans
Input/Turbine Speed Sensor Circuit Malfunction
Quick Answer
Error code P0715 on your Mercedes-Benz Sedans means: Input/Turbine Speed Sensor Circuit Malfunction. 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. Failed input speed sensor inside the transmission
  2. Damaged wiring harness to the transmission speed sensor
  3. Contaminated transmission fluid affecting sensor readings
  4. Corroded sensor connector at the transmission case
  5. Faulty transmission control module
How to Fix It
1
Check transmission fluid level and condition for contamination or metal particles
2
Inspect the speed sensor connector at the transmission for corrosion
3
Test the input speed sensor resistance with a multimeter
4
Check wiring between the sensor and transmission control module for damage
5
Replace the input speed sensor if out of specification
Pro Tip
This issue typically requires professional diagnosis. Attempting this fix without proper training could cause further problems.
Parts You May Need
Input/turbine speed sensor
Transmission fluid
Transmission filter
Sensor connector kit
Related Error Codes
P0171P0174P0300P0410P0420
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