@Technical Service Bulletin # Mercedes Benz E 550 Sedan (212.072) V8-5.5L (273.971) S-80_57-56 Date: 100908
Audio System - Radio Interruption Information
Date: September 8, 2010
Order No.: S-B-80.57/56
Group: 80
SUBJECT:
MY-All, Models 129, 163, 164, 170, 171, 199, 202, 203, 204, 207, 208, 209, 210, 211, 212, 215, 216, 219, 220, 221, 230, 251, 463
Interruptions in Radio-Operated Vehicle Systems
In the frequency range of the transmitter key or KEYLESS-GO, many other radio-operated Systems can also be transmitting and with a stronger
signal. Systems such as, radio frequency headphones, radio thermometer, garage door opener, alarm systems, etc. can prevent or interrupt unlocking,
locking, and engine starting via a KEYLESS-GO.
Fortunately, in parallel with radio remote control, most MB vehicles also have infrared remote control, so that even with radio disturbance, the
transmitter key will unlock and lock at short range. Exceptions are the 163 and the 170 as they do not have additional infrared remote control, but the
mechanical key will always work.
Advise customers that taking a vehicle key is always recommended as it is conceivable that a criminal might use a radio interferer to block the
locking of a vehicle. Locking is ensured by 3-signal flashing.
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