Fob Antenna
Thread Starter
Junior Member
Joined: Dec 2017
Posts: 30
Likes: 1
From: Bremerton, Wa
CLS55 AMG
Fob Antenna
Key Fob unlocks only when the key if right over driver side door. Doesn't work from a distance at all. What can I do to fix this? Key has brand new battery.
MBWorld Fanatic!
Joined: Jan 2014
Posts: 3,969
Likes: 1,317
From: Republic of Texas
'99 and '05 E55 AMG
For this fellow it was corroded batteries in the alarm siren:
https://mbworld.org/forums/w211-amg/...ml#post7511017
https://mbworld.org/forums/w211-amg/...ml#post7511017
Senior Member
Joined: Sep 2017
Posts: 499
Likes: 66
From: N.Y. L.I.
04 E55 AMG BLK/BLK(MyDD), 06 CLK 500 (wife's) 07 ML500, 2012 C300(son's)
I was just reading about something simular,,,,
Poor key fob / keyless entry range – The key lock and unlock signal for the doors is transmitted via the rear antenna. The antenna is connected to the rear SAM module and a short in the wiring can cause damage to the SAM unit. If this is your dilemma, you may notice a blown antenna fuse. Especially if you replace the fuse and it keeps on blowing. Don’t use a higher ampere rating fuse to try to fix this problem.
http://www.mercedesmedic.com/mercedes-sam-module/
Poor key fob / keyless entry range – The key lock and unlock signal for the doors is transmitted via the rear antenna. The antenna is connected to the rear SAM module and a short in the wiring can cause damage to the SAM unit. If this is your dilemma, you may notice a blown antenna fuse. Especially if you replace the fuse and it keeps on blowing. Don’t use a higher ampere rating fuse to try to fix this problem.
http://www.mercedesmedic.com/mercedes-sam-module/
