2014-2023 Mercedes E-Class Steering Column: Decoding Options, Noises, and Failures

Key Symptoms of Steering Column Failure

Problems with the steering column in a 2014-2023 E-Class can manifest in several ways, ranging from simple annoyances to critical safety issues. Understanding these symptoms can help you diagnose the problem correctly.

1. Noises When Turning or Adjusting

Squeaking, Rubbing, or Clicking: A squeaking or rubbing sound when turning the wheel at low speeds can be a sign of a dry or failing bearing, or an issue with the clock spring. A clicking noise is often associated with a damaged clock spring or a problem with the turn signal canceling mechanism. Some owners of the W212 generation have reported rattling noises at highway speeds that can be temporarily stopped by applying pressure to the steering wheel, indicating a loose component within the column assembly. There is a Technical Service Bulletin (TSB LI46.10-P-059943) for the W212 chassis that addresses creaking noises when turning, often resolved with a special lubricant.

2. Electronic Failures

Buttons, Horn, or Paddle Shifters Not Working: If the buttons on your steering wheel, the horn, or the paddle shifters work intermittently or not at all, the most likely culprit is a failed clock spring. The clock spring is a coiled ribbon of wires that can break after years of turning the steering wheel.

Airbag/SRS Warning Light: A broken clock spring will sever the connection to the driver's airbag, which will immediately trigger the SRS (Supplemental Restraint System) warning light on your dashboard. This is a critical safety failure, as the driver's airbag will not deploy in a collision. A recall (NHTSA ID 17V627) was issued for many 2012-2017 E-Class models for insufficient grounding that could, in combination with a broken clock spring, lead to an inadvertent airbag deployment.

Power Adjust Failure: The power tilt (up/down) and telescopic (in/out) functions can fail. Often, you may hear the motor trying to work, but the column doesn't move. This can be caused by a failed motor, a faulty switch, or a common issue on W212 models where a specific nut tightens itself and jams the mechanism.

3. Car Won't Start: The Electronic Steering Lock (ESL/ELV) Issue

This is a significant issue, primarily affecting the 2014-2016 W212 E-Class. The Electronic Steering Lock (ESL), also called ELV, is an anti-theft device that physically locks the steering column. When it fails, the car will not start. Symptoms include:

• You insert the key, and the lights on the dashboard come on, but the engine does not crank.
• The steering wheel remains locked and will not release.
• You may hear a faint, rapid clicking sound from the steering column area as the ESL motor tries, and fails, to disengage.
🎬 Watch: How to repair and position the ESL motor

Known Issues, Recalls, and Technical Service Bulletins (TSBs)

Several official actions and known problems affect the 2014-2023 E-Class steering column.

• NHTSA Recall 17V627 / 2017120024: This major recall affected 2012-2017 E-Class (W212/207) models for insufficient grounding of the steering column. An electrostatic discharge combined with a broken clock spring could lead to the driver's airbag deploying unexpectedly. The fix involves dealers adding a proper ground connection.
• NHTSA Recall 17V364000: Some 2017 E-Class (W213) vehicles were recalled because the steering column shift lever module could fail due to a damaged circuit board, preventing the driver from selecting gears.
• NHTSA Recall 15V289000: Affecting some 2015 E-Class models, this recall addressed a software issue in the steering column module that could cause the electric power steering to fail, making the vehicle very difficult to steer.
• TSB for Power Adjust Noise (LI46.15-P-061886): Addresses noises from the power tilt/telescope mechanism.
• TSB for Creaking Noise (LI46.10-P-059943): For W212 models, this TSB details a procedure to fix creaking noises when turning the wheel.

Buying a Used Steering Column: A Compatibility Guide

Purchasing a used steering column for a modern Mercedes-Benz is complex. Due to the deep integration of vehicle options, you cannot simply match by year and model. Using an incorrect column can result in non-functioning features or even prevent the car from starting.

The Golden Rule: Match Part Numbers and Options

The single most important factor is matching the OEM part number from your original column to the replacement. However, even this can be tricky as part numbers are often superseded. The true source of compatibility is the vehicle's specific option codes. You must buy a column from a vehicle with the exact same equipment as yours.

Key options that determine the correct steering column include:

• Vehicle Generation: W212 (2014-2016) and W213 (2017-2023) columns are not interchangeable.
• Drive System: All-Wheel Drive (4-MATIC) vs. Rear-Wheel Drive.
• Heated Steering Wheel: (Option Code 443)
• Driver Assistance: Adaptive Cruise Control (Distronic Plus) vs. standard cruise control.
• Lane Keep Assist
• Power vs. Manual Adjust

Physical Inspection Checklist

When inspecting a used steering column, check the following:

• Connectors: Ensure all electrical connectors are intact, with no bent pins or cut wires.
• Wiring Harness: Look for any signs of damage, fraying, or previous repairs.
• Clock Spring: While hard to inspect fully, check for any visible damage to the ribbon cable if possible. Assume it may need replacement.
• Physical Damage: Check the column tube and mounting brackets for any bends, cracks, or signs of impact from a collision.
• ESL (for W212): If buying a W212 column, try to get one that is confirmed to be in the 'unlocked' position. A locked ESL can make installation impossible.

Replacement and Calibration

Replacing the steering column is a complex job not recommended for beginners. The process involves disconnecting the battery, carefully removing the driver's airbag, steering wheel, and various trim pieces before unbolting the column itself.

Steering Angle Sensor (SAS) Calibration

After the new column is installed, the Steering Angle Sensor must be calibrated. This sensor tells the ESP and other safety systems which way the wheels are pointed. Without proper calibration, you will get an ESP error message, and the stability control system will not function correctly. Calibration can sometimes be done without a scan tool by starting the engine and turning the steering wheel from full lock to full lock a couple of times. 🎬 Watch: How to reset the steering angle sensor without tools However, the most reliable method is to use a Mercedes-compatible diagnostic scan tool to perform the zero-point calibration.

Frequently Asked Questions (FAQ)