P0718 on Mercedes-Benz
Input/Turbine Speed Sensor Circuit Intermittent
P0718 on Mercedes-Benz vehicles indicates input/turbine speed sensor circuit intermittent. Au7o has documented this code across 1 Mercedes-Benz model — most commonly on SLK/SLC. Set when the input/turbine speed sensor signal is intermittent — dropping out or spiking erratically rather than being continuously absent. Usually indicates a marginal sensor or loose wiring. Typical repair costs on Mercedes-Benz range from $500 to $2,200, depending on the specific model and root cause.
Common Causes of P0718
- •Intermittent open/short in sensor wiring
- •Loose or corroded connector
- •Failing input/turbine speed sensor
- •Debris intermittently affecting signal
- •Vibration-related harness fault
P0718 on Mercedes-Benz by Model
Mercedes-Benz SLK/SLC(1 issue)
- 7G-Tronic (722.9) Conductor Plate / Valve Body Failure Causing Limp Mode2005-2011
The electronic conductor plate integrated into the 722.9 7-speed automatic's valve body (which houses the internal TCM, speed sensors and shift solenoids) is a widely reported failure on R171 SLKs equipped with the 7G-Tronic. As the plate's internal speed sensors and soldered joints degrade with heat cycling, the transmission drops into limp mode, typically locking into a single forward gear (often 2nd). The condition is temperature-sensitive and commonly appears from roughly 50,000-90,000 miles.
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View P0718 across all makes →Frequently Asked Questions
What does P0718 mean on Mercedes-Benz?▼
P0718 stands for "Input/Turbine Speed Sensor Circuit Intermittent." Set when the input/turbine speed sensor signal is intermittent — dropping out or spiking erratically rather than being continuously absent. Usually indicates a marginal sensor or loose wiring. On Mercedes-Benz specifically, this code is documented across 1 model.
What causes P0718 on Mercedes-Benz vehicles?▼
Common causes on Mercedes-Benz: Intermittent open/short in sensor wiring, Loose or corroded connector, Failing input/turbine speed sensor, Debris intermittently affecting signal, Vibration-related harness fault. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0718 on a Mercedes-Benz?▼
Repair costs on Mercedes-Benz range from $500 to $2,200, depending on the specific model and root cause.
Which Mercedes-Benz models have P0718 documented?▼
Au7o has documented P0718 on 1 Mercedes-Benz model: SLK/SLC.