P0335 on Mercedes-Benz
Crankshaft Position Sensor A Circuit Malfunction
P0335 on Mercedes-Benz vehicles indicates crankshaft position sensor a circuit malfunction. Au7o has documented this code across 3 Mercedes-Benz models — most commonly on CLS-Class, E-Class, SLK-Class. This code means the engine computer has lost or detected a faulty signal from the crankshaft position sensor (sensor A), which tells the computer exactly how fast and in what position the crankshaft is rotating. That signal is essential for timing the spark and fuel injection, so a problem here can cause hard starting, stalling, or a no-start condition. The computer sets this code when the crank sensor signal is missing, erratic, or out of its expected pattern. Causes range from a failed sensor or damaged wiring to a problem with the reluctor (tone) ring the sensor reads. Typical repair costs on Mercedes-Benz range from $100 to $600, depending on the specific model and root cause.
Common Causes of P0335
- •Failed crankshaft position sensor
- •Damaged, corroded, or loose sensor wiring/connector
- •Metal debris or oil contamination on the sensor tip
- •Damaged or misaligned reluctor (tone) ring
- •Excessive air gap between sensor and tone ring
- •Wiring shorted or open in the sensor circuit
- •Faulty PCM/ECM (rare)
P0335 on Mercedes-Benz by Model
Mercedes-Benz CLS-Class(1 issue)
- Crankshaft Position Sensor Failure2012-2018
The crankshaft position sensor on M276 and M278 engines in the CLS fails without warning, causing an immediate engine stall and no-start condition. The sensor is located in a heat-exposed area near the bellhousing, and thermal cycling degrades the sensor over time. This is a roadside breakdown item that leaves the vehicle completely inoperable.
Mercedes-Benz E-Class(1 issue)
- Crankshaft Position Sensor Failure2010-2018
The crankshaft position sensor fails due to heat exposure and oil contamination, causing intermittent stalling, no-start conditions, and rough running. The sensor is mounted near the flywheel and exposed to high temperatures.
Mercedes-Benz SLK-Class(1 issue)
- Crankshaft Position Sensor Failure2000-2004
A common issue on early R170 SLK models is failure of the crankshaft position sensor, especially as heat and age degrade the sensor electronics. When the sensor signal drops out, the engine may stall when hot, crank without starting, or cut out intermittently because the ECU loses engine speed reference.
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View P0335 across all makes →Frequently Asked Questions
What does P0335 mean on Mercedes-Benz?▼
P0335 stands for "Crankshaft Position Sensor A Circuit Malfunction." This code means the engine computer has lost or detected a faulty signal from the crankshaft position sensor (sensor A), which tells the computer exactly how fast and in what position the crankshaft is rotating. That signal is essential for timing the spark and fuel injection, so a problem here can cause hard starting, stalling, or a no-start condition. The computer sets this code when the crank sensor signal is missing, erratic, or out of its expected pattern. Causes range from a failed sensor or damaged wiring to a problem with the reluctor (tone) ring the sensor reads. On Mercedes-Benz specifically, this code is documented across 3 models.
What causes P0335 on Mercedes-Benz vehicles?▼
Common causes on Mercedes-Benz: Failed crankshaft position sensor, Damaged, corroded, or loose sensor wiring/connector, Metal debris or oil contamination on the sensor tip, Damaged or misaligned reluctor (tone) ring, Excessive air gap between sensor and tone ring. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0335 on a Mercedes-Benz?▼
Repair costs on Mercedes-Benz range from $100 to $600, depending on the specific model and root cause.
Which Mercedes-Benz models have P0335 documented?▼
Au7o has documented P0335 on 3 Mercedes-Benz models: CLS-Class, E-Class, SLK-Class.