RAM 1500 2020 Owner's Manual page 156

154 SAFETY
Trailer Merge Assist
NOTE:
When Trailer Merge Assist is activated, Rear
Cross Path is disabled.
Trailer Merge Assist is a function of the Blind
Spot Monitoring (BSM) system that extends the
blind spot zone to work while pulling a trailer.
Trailer Merge Assist consists of three sub
functions:
Automatic Trailer Detection

Trailer Length Detection

Trailer Merge Warning

Blind Spot Zones With Trailer Merge Assist
1 — Vehicle
2 — Trailer
Automatic Trailer Detection
There are two modes of operation for the
detection of the trailer length:
Automatic Mode — When "Auto Mode" is

selected, the system will use the blind spot
sensors to automatically determine the pres-
ence and length of a trailer. The presence of
a trailer will be detected using the blind spot
radar within 90 seconds of forward move-
ment of the vehicle. The vehicle must be
moving above 6 mph (10 km/h) to activate
the feature. Once the trailer has been
detected, the system will default to the
maximum blind spot zone until the length has
been verified. You will see "Auto" in the
instrument panel cluster
Max Mode — When "Max Mode" is selected,

the system will default to the maximum blind
spot zone regardless of what size trailer is
attached
NOTE:
Selected setting is stored when the ignition is
placed in the OFF position. To change this
setting, it must be selected through the
Uconnect Settings. Refer to "Uconnect
Settings" in "Multimedia" for further informa-
tion .
Trailer Length Detection
Once the trailer presence has been established.
The trailer length will be established (by making
a 90 degree turn) and then the trailer length
category (example 10-20 ft (3 m to 6 m)) will be
displayed. This can take up to 30 seconds after
completing the turn.
NOTE:
During the same ignition cycle, if the vehicle is
at a standstill for a minimum of 90 seconds, a
new "trailer detection request" is enabled by
the system once the vehicle resumes motion.
Maximum length supported by the Trailer Merge
Assist feature is 39.5 ft (12 m). Trailer length is
.
considered the forward most portion of the
trailer hitch to the rearward most portion of the
body, bumper, or ramp of the trailer.
Maximum width supported by the Trailer Merge
Assist feature is 8.5 ft (2.59 m). Trailer width is
measured at the widest portion of the trailer
and may include wheels, tires, finders, or rails.