Mercedes Engine ECU A2709002100 Bosch 0261S09816 MED17.7.2 – tested module ready for programming
Original Mercedes-Benz engine ECU A2709002100 manufactured by Bosch with number 0261S09816, system MED17.7.2. This module is designed for selected Mercedes vehicles equipped with 4-cylinder gasoline engines, mainly from the M270 engine family.
This ECU is fully tested, ready for installation, but requires programming, adaptation or cloning for the specific vehicle. We also offer ECU cloning service after receiving the original module or EEPROM and FLASH files.
Application – Mercedes-Benz
The ECU may fit selected Mercedes-Benz models with 1.6 / 2.0 gasoline engines, however compatibility must always be verified by comparing the original ECU part number.
- Mercedes-Benz A-Class W176 – selected gasoline versions
- Mercedes-Benz B-Class W246 – selected gasoline versions
- Mercedes-Benz CLA C117 / X117 – selected gasoline versions
- Mercedes-Benz GLA X156 / W156 – selected gasoline versions
- Mercedes-Benz A45 AMG – selected MED17.7.2 versions
Most commonly found with 1.6 CGI / 2.0 CGI / 2.0 Turbo gasoline engines. Before purchase compare numbers A2709002100, A2709011700 and 0261S09816 with your damaged ECU.
Part Numbers
- A2709002100
- A 270 900 21 00
- A2709011700
- A 270 901 17 00
- 0261S09816
- 0 261 S09 816
- Bosch MED17.7.2
Programming / Cloning
The ECU is not Plug & Play without preparation. After installation, programming, immobilizer adaptation or cloning from the original ECU is required.
We can perform ECU cloning if we receive:
- the original engine ECU,
- or EEPROM and FLASH files read from the original module.
After successful cloning the ECU can operate like the original vehicle module without additional immobilizer adaptation.
Typical Symptoms of Faulty MED17.7.2 ECU
- no communication with engine ECU,
- engine will not start,
- injector or ignition faults,
- ECU power supply problems,
- rough engine operation,
- vehicle stalls or does not crank,
- immobilizer faults after ECU damage,
- damage after short circuit, water ingress or failed repair.
FAQ – Mercedes A2709002100 Bosch 0261S09816 MED17.7.2
Does ECU A2709002100 fit Mercedes A-Class W176?
Yes, ECU A2709002100 may be installed in selected Mercedes A-Class W176 gasoline models. Before purchase compare the original ECU numbers, especially 0261S09816 and MED17.7.2.
Is Bosch 0261S09816 ready for Plug & Play installation?
No. ECU Bosch 0261S09816 requires programming, adaptation or cloning. We can prepare the module after receiving the original ECU or EEPROM and FLASH files.
Are A2709011700 and A2709002100 the same ECU type?
Numbers A2709011700 and A2709002100 may appear on the same Mercedes MED17.7.2 ECU. For proper compatibility compare all labels from the original module.
Does this ECU fit Mercedes CLA C117 1.6 CGI?
ECU A2709002100 0261S09816 may fit selected Mercedes CLA C117 1.6 CGI gasoline versions. Part number matching and later programming or cloning are required.
Can MED17.7.2 ECU be cloned without sending the vehicle?
Yes. In many cases it is enough to send the original ECU or EEPROM and FLASH files. After data transfer the ECU can operate like the original module.
Does ECU A2709002100 fit Mercedes GLA 2.0 CGI?
This ECU number is found in selected Mercedes GLA gasoline 2.0 versions. Compatibility must be verified by comparing A2709002100, A2709011700 and 0 261 S09 816.
What to do if the original Mercedes ECU does not communicate?
If the original ECU does not communicate through OBD, it is often still possible to read data in bench service mode. EEPROM and FLASH data can then be transferred into a working MED17.7.2 ECU.