2020 Mercedes-Benz Sprinter Key Fob Programming Guide

Quick reference

Step-by-step on-board programming

Unfortunately, the 2020 Mercedes-Benz Sprinter does not support DIY on-board programming for its key fobs. Mercedes-Benz vehicles utilize advanced security systems that require specialized diagnostic equipment to program new keys and remotes. This procedure must be performed by a Mercedes-Benz dealership or a qualified automotive locksmith with the necessary tools and software.

Why no on-board programming?

Mercedes-Benz vehicles, including the Sprinter, incorporate sophisticated immobilizer systems. These systems prevent the engine from starting if the correct, uniquely coded key is not present and recognized. This security measure significantly reduces the risk of vehicle theft but also means that programming new keys is a complex process involving secure communication between the vehicle's onboard computer and the specialized diagnostic tool. This typically includes VIN-specific coding and synchronization that cannot be done manually by an owner.

Battery replacement

Replacing the battery in your 2020 Mercedes-Benz Sprinter key fob is a straightforward process.

1. Remove the emergency key: Slide the small latch on the back or side of the fob and pull out the metal emergency key blade.
2. Open the fob: With the emergency key removed, you'll see a small slot. Use a thin, flat object (like a small screwdriver or coin) to gently pry open the two halves of the fob.
3. Replace the battery: carefully remove the old CR2032 battery and insert a new one, ensuring the positive (+) side faces upwards (or as indicated inside the fob).
4. Reassemble: Snap the two halves of the fob back together until secure, then reinsert the emergency key blade.

Where to buy a replacement fob

When considering where to purchase a replacement key fob for your Sprinter, you have a few options, each with pros and cons:

• Mercedes-Benz Dealership:

  • Pros: Guaranteed genuine OEM part, expert programming, and support. Ensures full compatibility and functionality with your vehicle's security system.
  • Cons: Most expensive option. Expect to pay anywhere from $350 to $600+ for the key fob and programming.

• Automotive Locksmith:

  • Pros: Often more affordable than a dealership. Many locksmiths have the necessary diagnostic tools to program Mercedes-Benz keys. They can often come to your location.
  • Cons: Ensure the locksmith has experience with Mercedes-Benz Sprinter keys and the proper equipment. Prices can vary, but typically range from $250 to $450 for a new key and programming.

• Online Retailers (e.g., Amazon, eBay):

  • Pros: Potentially the cheapest initial purchase price for the physical fob.
  • Cons: You still need a dealership or locksmith to cut the emergency key blade and program the fob to your vehicle. Many online fobs may be of lesser quality or not fully compatible, leading to wasted money. Be wary of "new" fobs that are actually refurbished or cloned. This is generally not recommended for Mercedes-Benz vehicles due to the complex security systems.

If on-board programming isn't supported

As established, on-board programming is not an option for your 2020 Mercedes-Benz Sprinter. This means you will need professional assistance.

• Cost Expectations: As mentioned above, anticipate costs ranging from $250 to $600+ depending on whether you choose a locksmith or a dealership. This price typically includes the cost of the key fob itself, the cutting of the emergency key blade, and the programming fee.

• Immobilizer Transponder: The key fob for your Sprinter contains an embedded transponder chip, which is an integral part of the vehicle's immobilizer system. This transponder must be correctly programmed to communicate with your vehicle's engine control unit (ECU). Without proper programming, even if the key physically fits the ignition, the vehicle will not start. Modern Mercedes-Benz systems use advanced rolling code technology and encryption to prevent unauthorized access.

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