DTerry

Am looking for location of the AM/Keyless entry antenna amp for a 2004 E320 4Matic wagon. I understand it is in the headliner in the sedan but would like advice on how to find it in the wagon. I believe my shop either disconnected or broke it while fixing a rear windshield washer line problem.
Many thanks.

Plutoe

Does the vehicle have the keyless go option??

DTerry

No, just regular keyless entry. The IR works if used a few inches from the driver's door handle, but otherwise kaput.

konigstiger

Located behind left d-pillar.

Plutoe

Have you ruled out the possibility of bad key fob batteries. Additionally if you have a spare key fob do you get the same result.

DTerry

Batteries are fresh. All three keys perform the same way.

Plutoe

The next step ain't simple unless you have a friend with a DAS Xentry(Star) diagnostic tool.

I say that because there are many electromechanical components that have to work correctly to open and close the vehicle---which one is not working---a huge guess without a quick test of the appropriate components. Then you start changing out components and that gets expensive with the possibility that the problem persists.