Fob Antenna
11-06-2018, 06:06 PM
#1
Junior Member
Thread Starter
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.
11-07-2018, 10:46 AM
#2
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Join Date: Jan 2014
Location: Republic of Texas
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'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
11-08-2018, 02:17 AM
#3
Senior Member
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/
