Dodge RAM 2500 2022 Owner's Manual page 316

312 SAFETY
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 movement 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
Maximum 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
Ú page 247.
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 (e.g. 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,
fascia/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.
NOTE:
Fifth wheel or gooseneck trailers are not supported
by Trailer Merge Assist.
Trailer Length Detection
1 — Trailer Length
2 — Trailer Hitch
3 — Trailer Width
Trailer length will be identified and placed into one
of the following categories:
Trailer length up to 10 ft (3 m) — Blind Spot zone

will be adjusted to 10 ft (3 m)
Trailer length between 10 ft to 20 ft (3 m to

6 m) — Blind Spot zone will be adjusted to
20 ft (6 m) .
Trailer length between 20 ft to 30 ft (6 m to

9 m) — Blind Spot zone will be adjusted to
30 ft (9 m) .
Trailer length between 30 ft and 39.5 ft (9 m to

12 m) — Blind Spot zone will be adjusted to
Max distance .
.