Where is the secondary air solenoid located on a Mercedes Benz?
The secondary air solenoid is located at the right front of the engine (red arrow). Working at the engine cover (red arrow), pull off the two front air duct hoses (green arrows). To detach the ducts, pull them straight off the engine cover / air filter housing.
How to test Mercedes Benz secondary air system?
The secondary air system is prone to faults that illuminate the check engine light. If you have fault codes for your secondary air, check the operation of the pump. You can test the function of the secondary air components using a Mercedes-Benz scan tool.
How to test the secondary air pump solenoid?
Start the engine. You should have manifold vacuum at all times (green arrow). If not, check if the vacuum hose is broken between the solenoid and intake manifold. Secondary air pump check valve solenoid testing: Next, remove the vacuum hose from one of the check valves.
Where is the secondary air pump in a Mercedes Benz?
Secondary air pump testing: The secondary air pump is located at the front of the engine (green arrow). Secondary air pump testing: Disconnect the air pipe. Start by removing the pipe from the secondary air pump. Start the engine, (it should be cold).
The secondary air solenoid is located at the right front of the engine (red arrow). Working at the engine cover (red arrow), pull off the two front air duct hoses (green arrows). To detach the ducts, pull them straight off the engine cover / air filter housing.
The secondary air system is prone to faults that illuminate the check engine light. If you have fault codes for your secondary air, check the operation of the pump. You can test the function of the secondary air components using a Mercedes-Benz scan tool.
Start the engine. You should have manifold vacuum at all times (green arrow). If not, check if the vacuum hose is broken between the solenoid and intake manifold. Secondary air pump check valve solenoid testing: Next, remove the vacuum hose from one of the check valves.
Secondary air pump testing: The secondary air pump is located at the front of the engine (green arrow). Secondary air pump testing: Disconnect the air pipe. Start by removing the pipe from the secondary air pump. Start the engine, (it should be cold).