Tito Santiago

fob key 2004 clk 320 works from 3 inches but won't work from 3 ft

Rudeney

Check fuse #8 in the trunk.

Tito Santiago

​​​​​​Done that fuse is good key is new and I changed fuse and the battery. Appreciate it, thanks

Rudeney

In that case, you probably have a failed antenna amp. It's attached to the top edge of the rear glass, under the stubby antenna, above the headliner. It's not really a viable DIY to replace it, and it's not really worth paying to have it don, either.

MacVidMB-V8

Do you have 2nd key ?

If you only have one it could be RF part of key has failed.

How is radio reception on AM and FM?