1998 w163 mystery connector
 

I have a 1998 ML320 please identify this connector behind the heater/AC control panel
there a 5 pins - 2 blue, 1 brown, 1 green and 1 white wires
The connector has 474110 - photo attached
This model is equipped with ETS

2nd Issue - check engine light - p1453 State: Historic K40/7kN (Air pump relay) this code from a icarsoft scanner
changed relay, 40amp fuse, pump, change over valves
checked all vacuum hoses, cleaned EGR valve and changed vacuum lines
cleaned the 2 vacuum valves sticking up from the intake
Clear code, keeps returning
Can this be fixed without taking to shop?
Thank you

https://cimg2.ibsrv.net/gimg/www.mbw...2b2c56099.jpeg
Mystery connector

Mystery connector

Regarding codes, try searching this site for "P1453". See if this helps:

https://mbworld.org/forums/c36-amg-c...bd2-codes.html

In the case above, a fuse was the solution. Possibly also a relay. Both are easy and low cost, if in fact they are the cause of the code.

Hi thank you for your message
re: code p1453 - I have changed the 40amp fuse and relay - not convinced that there is power to the fuse or air pump
what next?
thanks

Is the connector for the fog lamp switch?
For the other issue, once the fault codes were cleared, did the air injection pump turn on at all before the fault code returned?
If nothing activates and it instantly triggers that fault code, I'm thinking the drivers side fuse and relay box has an internal open circuit or the AAM module can't activate the relay box air pump circuit for some internal fault.

As for the connector, inspect all sides of it and there will be a 10 digit part number stamped on it as such...xxx xxx xx xx.

The AIR relay (K28) is located in this position.

https://cimg9.ibsrv.net/gimg/www.mbw...dad5ade47d.jpg