RAM Commercial PROMASTER 2022 Owner's Manual page 156

154 SAFETY
Trailer Merge Assist — If Equipped
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.
NOTE:
When Trailer Merge Assist is activated, Rear Cross
Path is disabled.
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 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 123.
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.
The maximum trailer 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.
The 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.