2015 Mercedes-Benz Sprinter Key Fob Programming Guide

Quick reference

Step-by-step on-board programming

Unfortunately, the 2015 Mercedes-Benz Sprinter does not support DIY on-board programming for its key fobs. The sophisticated security systems in Mercedes-Benz vehicles, including the Sprinter, require specialized diagnostic equipment and software to program new keys and remotes. This process typically involves coding the new key to the vehicle's immobilizer system, which can only be done by a Mercedes-Benz dealership or a qualified automotive locksmith with the necessary tools.

Attempting to program these fobs yourself without the proper equipment can lead to issues with your vehicle's security system and may even render the new key unusable. It's always best to rely on professionals for this type of service.

Battery replacement

1. Locate the small release tab or button on the side or back of the key fob. Press it to release the emergency key blade.
2. With the emergency key removed, you'll see a slot. Insert a thin flat-head screwdriver or a coin into this slot and carefully pry the two halves of the fob apart.
3. Gently remove the old batteries. Note the orientation of the batteries before removing them, as they must be replaced in the same way.
4. Insert two new CR2025 batteries, ensuring the positive (+) side faces upwards.
5. Align the two halves of the key fob and press them together until they click securely into place.
6. Reinsert the emergency key blade.

Where to buy a replacement fob

• Mercedes-Benz Dealership: This is the most reliable option, as you're guaranteed to receive a genuine OEM part that is compatible with your vehicle. However, it's also typically the most expensive, often ranging from $300 to $500 or more, including programming.
• Automotive Locksmith: A qualified automotive locksmith can often provide and program new key fobs for your Sprinter at a more competitive price than the dealership, usually between $200 and $400. They have the specialized tools required for programming and can also cut the mechanical key blade on-site.
• Online Retailers (e.g., Amazon, eBay): You can find blank key fobs online for significantly less, sometimes as low as $50-$100. However, be extremely cautious! Ensure the FCC ID (IYZDC07C) and part numbers match exactly. Even if the blank fob looks identical, an incorrect internal board will not work. Additionally, you will still need a locksmith or dealer to cut the key blade and program the fob to your vehicle, adding to the total cost. Buying a used or incompatible fob online will result in a wasted purchase.

If on-board programming isn't supported

As established, on-board programming is not an option for the 2015 Mercedes-Benz Sprinter. This means you will need professional assistance to program a new key fob.

Cost expectations: As detailed above, expect to pay between $200 and $500 for a new key fob and programming, depending on whether you go through a locksmith or a dealership. This cost covers not only the physical fob but also the specialized labor and equipment required to sync the new key with your vehicle's immobilizer system.

Immobilizer Transponder: The 2015 Sprinter utilizes a sophisticated immobilizer system that requires the new key fob to be programmed directly to the vehicle's Engine Control Unit (ECU). This involves writing specific transponder codes to the vehicle's security module, ensuring that only correctly coded keys can start the engine. This is why DIY methods are not possible and professional tools are essential.

Find a mobile locksmith or shop on Repairius.