How to Unstick a Stuck Ignition Key on a 1973 to 1995 Mercedes-Benz

Oct 27, 2018


Welcome to Grafco Electric's comprehensive guide on how to unstick a stuck ignition key on a 1973 to 1995 Mercedes-Benz. If you're struggling with a key that won't budge in your car's ignition, we have expert tips and techniques to help you resolve the issue swiftly and effortlessly.

Understanding the Problem

Stuck ignition keys can be quite frustrating, especially when you're in a hurry or need to start your Mercedes-Benz urgently. The problem can occur due to various reasons, including wear and tear, dirt or debris in the ignition mechanism, or a faulty ignition switch. Our goal is to help you identify the underlying cause and provide effective solutions.

Step-by-Step Instructions

Step 1: Assess the Situation

Start by assessing the severity of the issue. Is the key slightly stuck, partially stuck, or completely immovable? Understanding the extent of the problem will help determine the appropriate actions to take.

Step 2: Lubricate the Ignition Mechanism

Using a high-quality lubricant specifically designed for automotive use, apply a small amount to the key and insert it into the ignition. Gently wiggle the key in an attempt to dislodge any debris or grime that may be causing the sticking.

Step 3: Try a Different Key

If you have access to another key for your Mercedes-Benz, try using it in the ignition. Sometimes, the issue may be with the specific key rather than the ignition itself. If the different key works smoothly, you may need to replace the problematic key.

Step 4: Clean the Ignition Cylinder

Over time, dirt and debris can accumulate in the ignition cylinder, hindering the smooth rotation of the key. Using compressed air or a soft brush, carefully clean the inside of the cylinder to remove any obstructions. Be cautious not to damage any delicate components during the cleaning process.

Step 5: Check the Ignition Switch

If the above steps haven't resolved the issue, it's essential to examine the ignition switch. A faulty switch can prevent the key from turning freely. Consider seeking professional assistance from a qualified mechanic to diagnose and repair any problems with the ignition switch.

Preventive Measures

To minimize the chances of experiencing a stuck ignition key in the future, we recommend the following preventive measures:

  • Regularly lubricate keyholes and ignition cylinders
  • Ensure keys are not bent or damaged before inserting them into the ignition
  • Keep your Mercedes-Benz clean to prevent debris buildup
  • Address any ignition-related issues promptly to avoid further complications


Dealing with a stuck ignition key can be a bothersome inconvenience. However, with the guidance provided by Grafco Electric in this comprehensive guide, you should now be equipped with the knowledge and techniques required to unstick a stuck ignition key on your 1973 to 1995 Mercedes-Benz. Remember, if problems persist, it's always wise to consult a professional for further assistance.