2011: Smart Car Tan Code Calculator
If you have acquired a TAN code calculator (either via a mechanic friend or software download), follow this step-by-step guide:
Colloquially, the Smart Car TAN Code Calculator refers to two distinct things:
For the 2011 Smart Fortwo, the situation is nuanced. The 2011 model year sits near the middle of the second-generation (451) production run (2007–2014). By 2011, Smart had hardened its security. Early 451s (2007-2009) were easier to bypass with aftermarket TAN calculators. But from late 2010 onward, Mercedes introduced rolling code updates and used more robust challenge-response algorithms (likely based on a proprietary pseudo-random function seeded with a master key known only to Mercedes).
Mercedes-Benz has been phasing out TAN codes for newer vehicles (2018+), replacing them with online authentication via XENTRY Pass-Thru – essentially, the car phones home directly. But the 2011 Smart Fortwo remains in the TAN era. As long as these cars stay on the road, the TAN calculator – whether a dealer’s backend or an aftermarket tool – will whisper secrets to the SAM unit, allowing keys to be born, immobilizers to sleep, and 12-year-old city cars to start another day.
For the 2011 Smart owner, the lesson is simple: respect the TAN, keep your dealer’s number handy, and never lose your last working key. Because without a TAN, that quirky two-seater becomes a very small, very expensive sculpture.
Disclaimer: This article is for informational purposes only. Circumventing vehicle immobilizers without proper ownership documentation may be illegal. Always consult a licensed professional or dealership for vehicle security services.
For owners and technicians working with 2011 Smart models (such as the Smart Fortwo), the Smart Car TAN Code Calculator is a vital diagnostic software tool used to unlock restricted administrative and performance features within the vehicle's electronic control units (ECUs). What are TAN Codes?
A Transaction Authorization Number (TAN) is a unique, 12-digit cryptographic code required by Mercedes-Benz/Smart diagnostic systems, primarily the Diagnostic Assistance System (DAS). Without these codes, many critical programming and configuration tasks remain "locked," preventing even advanced aftermarket tools from completing certain repairs or upgrades. Core Functions of the Calculator
The calculator works by generating these 12-digit codes based on the vehicle’s specific Vehicle Identification Number (VIN) or a "request-code" generated by the DAS software. Key use cases for a 2011 Smart vehicle include:
Key Learning: Programming new transponder keys or reprogramming existing ones after a loss of synchronization. smart car tan code calculator 2011
Feature Activation: Enabling factory options that may not have been active at purchase, such as:
Softouch Activation: Converting a standard manual-shift mode to full automatic mode.
Cruise Control (Tempomat): Activating the cruise control system after installing the necessary hardware.
Paddle Shifters: Enabling gear shifting from the steering wheel.
Performance Tuning: Activating specific Brabus Performance Tuning software profiles for enhanced engine and transmission response.
Hardware Synchronization: Assigning and synchronizing the Signal Acquisition and Actuation Module (SAM) when a unit is replaced or repaired. Technical Workflow
To use the tool, a technician typically follows these steps:
Connect the car to a Mercedes/Smart diagnostic interface (like the MB Star C3 or C4).
Open the DAS program and navigate to the "Special Functions" or "Equipment Codes" menu. The program provides a "Request Code" or asks for the VIN. If you have acquired a TAN code calculator
Input this data into the TAN Code Calculator to generate the required 12-digit string.
Enter the generated code back into the DAS field to authorize the command. Important Considerations for 2011 Models
For the 2011 model year, which falls under the 451 chassis generation, TAN codes are essential for replacing internal components like the SRS (Airbag) control module, which requires specific programming and coding by the dealer or an equipped specialist to function correctly after replacement. While many modern "online" versions of these calculators exist, they often require a subscription or per-calculation fee.
Скачать DAS Smart calculator Smart Car Tan Code Calculator
To use a Smart Car TAN code calculator for your 2011 model, you generally need the vehicle's VIN or a request code generated by diagnostic software like Mercedes-Benz DAS/Xentry. What is a TAN Code?
A TAN (Transaction Authorization Number) code is a 12-digit security code required to unlock special features or perform specific maintenance tasks within the Mercedes-Benz DAS (Diagnosis Assistance System) software.
For a 2011 Smart Fortwo, common uses for these codes include: Key Learning: Programming new or replacement keys.
Feature Activation: Enabling SOFTOUCH (automatic shifting), Paddle Shifters (gearshift on steering wheel), or Cruise Control (TEMPOMAT).
Hardware Changes: Tuning (e.g., BRABUS software) or assigning a new SAM Unit (Signal Acquisition and Actuation Module). Step-by-Step Calculation Guide For the 2011 Smart Fortwo , the situation is nuanced
If you are using an online calculator service like onauto.xyz, follow these steps: Locate your VIN:
Find it on the driver's side lower windshield (visible from outside). Look for a sticker on the driver's door pillar or frame. Check under the passenger seat carpet or in the trunk area.
Generate a Request Code: Connect your car to the DAS diagnostic tool. When you attempt to access a protected feature (like key programming), the software will display a unique "Request Code."
Enter Data into Calculator: Input either the VIN or the Request Code into the calculator tool.
Calculate & Input: Click the "Calculate" button to generate the 12-digit TAN code. Manually type this code into the bottom field of the DAS window to authorize the action.
Note: TAN code calculators are often paid third-party services, as they are not publicly provided for free by the manufacturer. SMART TAN Code calculator for DAS
There is one legitimate use: radio unlock codes (not TAN for immobilizer). For a 2011 Smart’s stock radio (e.g., Alpine unit), you can calculate the code from the serial number. Some websites do that for $5–15. That’s not a “TAN code” — it’s a radio PIN.
If you need key programming, skip the calculators entirely.
This is the most challenging part for DIY owners. Here are your three best options:
The fuel pump relay will now activate. You can safely drain the fuel tank.
If you have a legitimate TAN but the car rejects it, consider: