2019-2022 Mercedes E350 Steering Column: Power Adjust Failure & Heated Wheel Options

Symptoms of a Failing Steering Column

Failures in the E350's steering column are typically electronic or mechanical in nature, rather than issues with the primary steering shaft itself. Here are the most common symptoms:

• Power Adjustment Failure: The most frequent complaint is the inability to move the steering wheel up, down, in, or out. You might hear a click or no sound at all when using the adjustment switch. This usually points to a failed motor or a problem with the control module.
• Warning Lights on Dash: An illuminated ESP (Electronic Stability Program) or ABS light can be triggered by a faulty Steering Angle Sensor (SAS). This sensor is integrated into the column, and if it fails, the car's stability and traction control systems will be disabled.
• Steering Wheel Controls Not Working: If your radio, phone, or cruise control buttons on the steering wheel become intermittent or stop working entirely, it often indicates a problem with the internal wiring or the clock spring housed within the column.
• Noises During Adjustment: Grinding, clicking, or popping sounds when you try to adjust the steering wheel position suggest a stripped gear or a mechanical issue within the adjustment mechanism.
• Loose Steering Feel or Knocking: While less common for the column itself, a knocking noise or a feeling of excessive play in the steering can sometimes be traced back to loose components within the column assembly or its mounting points. More often, this is related to other front-end parts like tie rods or the steering rack.

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

While there are no recalls specifically for the steering column assembly on the 2019-2022 E350, there are related items to be aware of:

• NHTSA Recall 22V-189: This recall affects some 2021-2022 E-Class models equipped with a heated leather steering wheel. A software error in the hand detection control unit could prevent the system from detecting when the driver's hands are off the wheel while using Active Distance Assist DISTRONIC. The remedy is a software update performed by a dealer. While this is not a column failure, it involves a system integrated with the steering wheel.
• Service Campaign 2019080019: This campaign applies to some earlier W213 models (up to 2017) concerning corroding bolts on the steering rack, not the column itself. It's a good reminder of how interconnected steering components are.

Always check your vehicle's VIN on the NHTSA or Mercedes-Benz USA websites for any open recalls.

Buying a Used Steering Column: A Buyer's Guide

Purchasing a used OEM steering column is a cost-effective solution, but careful verification is essential due to the high number of variations. Follow these steps to ensure you get the right part.

1. The Golden Rule: Match Part Numbers Exactly

Mercedes uses numerous part numbers for steering columns based on the vehicle's specific options. Do not buy a column based on vehicle year and model alone. You must match the OEM part number from your original column to the part number on the used unit. The part number is typically on a sticker on the column housing.

2. Heated Steering Wheel vs. Non-Heated

This is the most critical compatibility check. The provided buyer warnings highlight this common mistake. A column designed for a heated wheel has different wiring and connectors than one for a non-heated wheel. They are not interchangeable. Before purchasing, confirm if your E350 has the heated steering wheel option (usually a small button on the steering wheel or lower dash) and ensure the used column comes from a vehicle with the exact same feature.

3. Power Adjust Feature

All 2019-2022 E350 models came standard with a power-adjustable steering column. Ensure the used part is also a power-adjust unit, which it should be if it's from a compatible vehicle. The key is ensuring the other options, like heating, match.

4. Physical Inspection Checklist

• Connectors: Inspect all electrical connectors for bent, broken, or corroded pins. The main harness connector is especially important.
• Shaft and U-Joints: Check the lower steering shaft and any universal joints for signs of excessive rust, binding, or physical damage.
• Clock Spring: While hard to test off the car, ensure the clock spring ribbon cable is not visibly torn or damaged. Ask the seller if the steering wheel controls and airbag were functional on the donor car.
• Mounting Points: Check that all mounting brackets are intact and not bent or cracked.

Cost Comparison

Replacing a steering column is a significant expense, making a used OEM part an attractive option.

Replacement Overview & Calibration

• Difficulty: 5 out of 5
• Primary Steps: The process involves disconnecting the battery, carefully removing the driver's airbag, removing the steering wheel, removing plastic shrouds and trim, disconnecting multiple sensitive electrical connectors, and unbolting the column from the dash support and the intermediate steering shaft.
• Mandatory Calibration: After installation, the Steering Angle Sensor (SAS) MUST be calibrated using a Mercedes-specific diagnostic scan tool (like XENTRY/DAS). This procedure tells the car's computer the new sensor's straight-ahead position. Skipping this step will result in ESP/ABS warning lights and a disabled stability control system, which is a major safety risk.

Frequently Asked Questions (FAQ)