Prenco 4D-1084 Engine Crankshaft Position Sensor

Engine Crankshaft Position Sensor for Mercedes-Benz

Prenco 4D-1084 is an engine crankshaft position sensor built for direct-fit service on select Mercedes-Benz applications. It uses a round connector with a female connector housing, male terminal, and a single pin terminal layout for straightforward electrical connection.

Compatible With Mercedes-Benz SL600, S320, S420, S500, S600, SLK230, C230, SL500, E420, SL320, and E320 applications across the listed model years.

Key Features

• Engine crankshaft position sensor for ignition and engine speed signal input
• Round connector design with 1 connector and 1 terminal
• Female connector gender and male terminal gender
• Sensor body diameter: 0.58
• Mounting bracket not included
• Prenco part number 4D-1084

Detailed Description

The Prenco 4D-1084 crankshaft position sensor monitors crankshaft position and rotational timing data used by the engine management system. This sensor is a fitment-based replacement for Mercedes-Benz models including SL600, S320, S420, S500, S600, SLK230, C230, SL500, E420, SL320, and E320. It is also cross-referenced to Beck/Arnley 180-0421 and Bosch 0281002123 for the same application.

Use this sensor when servicing ignition and engine timing inputs on Mercedes-Benz vehicles from 1996 through 2002, depending on model. The compact 0.58 body diameter and single-pin electrical layout support a direct replacement approach where the original connector style matches.

Common Issues This Part Can Address

• Crankshaft signal loss causing no-start conditions
• Intermittent stalling related to engine speed input failure
• Rough running from inaccurate crank position data
• Check engine light triggered by crankshaft sensor faults
• Hard starting caused by inconsistent ignition timing input

Installation Notes and Tips

Verify connector shape, terminal count, and sensor body diameter before installation. Confirm the vehicle application against the listed Mercedes-Benz fitment, including SL600, S320, S420, S500, S600, SLK230, C230, SL500, E420, SL320, and E320. Because no mounting bracket is included, reuse the existing bracket or mounting arrangement if required by the vehicle.

For best results, inspect the harness connector, wiring condition, and surrounding ignition components during replacement. The Prenco 4D-1084 should be matched to the original sensor configuration before installation.

Quality Assurance

Prenco replacement sensors are cataloged for specific OE-style applications and interchange references, helping support accurate parts matching for Mercedes-Benz crankshaft position sensor service.