NHTSA Service Bulletin 11031639: 2016, 2017 Smart Fortwo
Official manufacturer communication context for 2016, 2017 Smart Fortwo, with affected products, buyer checks and links into Carchieve recall, problem and VIN research.
Reviewed June 2026 from NHTSA manufacturer communication and service bulletin records. Carchieve is independent and not affiliated with any vehicle manufacturer or government agency.
In our continuing efforts to assure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, Mercedes-Benz AG (MBAG), the manufacturer of Mercedes-Benz vehicles is extending the warranty coverage on the change-over valve in certain Model Year (MY) vehicles listed below from the original New Vehicle Limited Warranty of 4 years/50,000 miles to 10 years/120,000 miles (whichever occurs first) due to the following condition: The change-over valve, which is responsible for the vacuum control to open and close the heating shut-off valve within the coolant circuit, could corrode internally due to water intrusion. Consequently, the internal corrosion could prevent proper operation of the heating shut-off valve. Please be advised that all repairs being claimed under this extended warranty must have a quick test uploaded with the following fault code information and may be audited. P26AB00 - THE SHUT OFF VALVE OF THE COOLANT CIRCUIT JAMS IN THE OPEN POSITION All repairs found to be functioning properly or without proper documentation will be returned and the claim debited in full. Only the following damage codes and parts can be claimed for the aforementioned repairs: Damage Codes: 2002X Change-Over Valve Parts: A2812030100 Coolant Hose Please note that damage incurred from abuse, accident, vandalism or other non-warrantable causes which are not covered by the New Vehicle Limited Warranty are similarly not covered by this Extended Warranty.
What this bulletin may mean before buying
Treat this as service research, not a verdict on one car. Before you buy, compare this communication with official recall campaigns, model-level owner complaint patterns, and the exact vehicle’s VIN-decoded specifications. A bulletin can help you ask a seller or dealer sharper questions about software updates, known repairs, warranty extensions and service history.
Affected products listed in this communication
Buyer checklist
- Run the 17-character VIN and confirm the year, make, model, engine and equipment match the listing.
- Check recall campaign pages for safety actions that may require dealer repair.
- Compare this bulletin with common problem pages for the same model and component area.
- Ask the seller or dealer whether the bulletin procedure, update or inspection has already been completed.
- Use the used-car buying checklist and get an independent inspection.
Frequently asked questions
What is NHTSA service bulletin 11031639?
In our continuing efforts to assure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, Mercedes-Benz AG (MBAG), the manufacturer of Mercedes-Benz vehicles is extending the warranty coverage on the change-over valve in certain Model Year (MY) vehicles listed below from the original New Vehicle Limited Warranty of 4 years/50,000 miles to 10 years/120,000 miles.
Is a service bulletin the same as a recall?
No. A recall is a safety campaign with a required remedy for affected VINs. A service bulletin or manufacturer communication usually describes diagnostic, repair, software, warranty or service information.
How should a used-car buyer use this bulletin?
Use it as a research signal. Compare it with recalls, owner complaints, service records, a VIN report and an independent inspection before buying.
Check the exact VIN before you buy
Model-level pages show public safety patterns. A full VIN report helps confirm the exact vehicle, decoded specs, recall applicability and buyer checks.
Get Full Report