diff --git a/itl/plugins-contrib.d/systemd.conf b/itl/plugins-contrib.d/systemd.conf
index 236499bc45e..3188428a8e7 100644
--- a/itl/plugins-contrib.d/systemd.conf
+++ b/itl/plugins-contrib.d/systemd.conf
@@ -4,48 +4,131 @@ object CheckCommand "systemd" {
 	command = [ PluginContribDir + "/check_systemd" ]
 
 	arguments = {
+		/* General options */
+		"-v" = {
+			set_if = {{ macro("$systemd_verbose_level$") == 1 }}
+			description = "Increase verbosity level (Accepted values: `1`, `2` or `3`). Defaults to none."
+		}
+		"-vv" = {
+			set_if = {{ macro("$systemd_verbose_level$") == 2 }}
+		}
+		"-vvv" = {
+			set_if = {{ macro("$systemd_verbose_level$") == 3 }}
+		}
+
+		/* Options related to unit selection */
+		"--ignore-inactive-state" = {
+			value = "$systemd_ignore_inactive_state$"
+			description = {{{Ignore an inactive state on a specific unit. Oneshot
+services for example are only active while running and
+not enabled. The rest of the time they are inactive.
+This option has only an affect if it is used with the
+option -u.}}}
+		}
+		"--include" = {
+			value = "$systemd_include$"
+			description = {{{Include systemd units to the checks. This option can be
+applied multiple times, for example: -I mnt-data.mount
+-I task.service. Regular expressions can be used to
+include multiple units at once, for example: -i
+'user@\d+\.service'. For more informations see the
+Python documentation about regular expressions
+(https://docs.python.org/3/library/re.html).}}}
+			repeat_key = true
+		}
 		"--unit" = {
 			value = "$systemd_unit$"
 			description = "Name of the systemd unit that is being tested."
 		}
+		"--include-type" = {
+			value = "$systemd_include_type$"
+			description = "One or more unit types (for example: 'service', 'timer')"
+		}
 		"--exclude" = {
-			value = "$systemd_exclude_unit$"
-			description = "Exclude a systemd unit from the checks. This option can be applied multiple times. Also supports regular expressions."
+			value = "$systemd_exclude$"
+			description = {{{Exclude a systemd unit from the checks. This option can
+be applied multiple times, for example: -e mnt-
+data.mount -e task.service. Regular expressions can be
+used to exclude multiple units at once, for example: -e
+'user@\d+\.service'. For more informations see the
+Python documentation about regular expressions
+(https://docs.python.org/3/library/re.html).}}}
 			repeat_key = true
 		}
-		"--no-startup-time" = {
-			set_if = "$systemd_no_startup_time$"
-			description = "Don’t check the startup time. Using this option the options `systemd_warning` and `systemd_critical` have no effect. (Default: `false`)"
+		"--exclude-unit" = {
+			value = "$systemd_exclude_unit$"
+			description = "Name of the systemd unit that is being tested."
 		}
-		"--warning" = {
-			value = "$systemd_warning$"
-			description = "Startup time in seconds to result in a warning status. (Default: `60s`)"
+		"--exclude-type" = {
+			value = "$systemd_exclude_type$"
+			description = "One or more unit types (for example: 'service', 'timer')"
 		}
-		"--critical" = {
-			value = "$systemd_critical$"
-			description = "Startup time in seconds to result in a critical status. (Default: `120s`)"
+		"--state" = {
+			value = "$systemd_state$"
+			description = {{{Specify the active state that the systemd unit must have
+(for example: active, inactive)}}}
 		}
+
+		/* Timers related options */
 		"--dead-timers" = {
-			set_if = "$systemd_dead_timers$"
-			description = "Detect dead / inactive timers. (Default: `false`)"
+			value = "$systemd_dead_timers$"
+			description = {{{Detect dead / inactive timers. See the corresponding
+options '-W, --dead-timer-warning' and '-C, --dead-
+timers-critical'. Dead timers are detected by parsing
+the output of 'systemctl list-timers'. Dead timer rows
+displaying 'n/a' in the NEXT and LEFT columns and the
+time span in the column PASSED exceeds the values
+specified with the options '-W, --dead-timer-warning'
+and '-C, --dead-timers-critical'.}}}
 		}
-		"--dead-timers-warning" = {
+		"--timers-warning" = {
 			value = "$systemd_dead_timers_warning$"
-			description = "Time ago in seconds for dead / inactive timers to trigger a warning state (by default 6 days)."
+			description = {{{Time ago in seconds for dead / inactive timers to
+trigger a warning state (by default 6 days).}}}
 		}
-		"--dead-timers-critical" = {
+		"--timers-critical" = {
 			value = "$systemd_dead_timers_critical$"
-			description = "Time ago in seconds for dead / inactive timers to trigger a critical state (by default 7 days)."
+			description = {{{Time ago in seconds for dead / inactive timers to
+trigger a critical state (by default 7 days).}}}
 		}
-		"-v" = {
-			set_if = {{ macro("$systemd_verbose_level$") == 1 }}
-			description = "Increase verbosity level (Accepted values: `1`, `2` or `3`). Defaults to none."
+
+		/* Startup time related options */
+		"--no-startup-time" = {
+			value = "$systemd_no_startup_time$"
+			description = {{{Don’t check the startup time. Using this option the
+options '-w, --warning' and '-c, --critical' have no
+effect. Performance data about the startup time is
+collected, but no critical, warning etc. states are
+triggered.}}}
 		}
-		"-vv" = {
-			set_if = {{ macro("$systemd_verbose_level$") == 2 }}
+		"--warning" = {
+			value = "$systemd_warning$"
+			description = {{{Startup time in seconds to result in a warning status.
+The default is 60 seconds.}}}
 		}
-		"-vvv" = {
-			set_if = {{ macro("$systemd_verbose_level$") == 3 }}
+		"--critical" = {
+			value = "$systemd_critical$"
+			description = {{{Startup time in seconds to result in a critical status.
+The default is 120 seconds.}}}
+		}
+
+		/* Monitoring data acquisition */
+		"--dbus" = {
+			value = "$systemd_dbus$"
+			description = {{{Use the systemd’s D-Bus API instead of parsing the text
+output of various systemd related command line
+interfaces to monitor systemd. At the moment the D-Bus
+backend of this plugin is only partially implemented.}}}
+		}
+		"--cli" = {
+			value = "$systemd_cli$"
+			description = {{{Use the text output of serveral systemd command line
+interface (cli) binaries to gather the required data for
+the monitoring process.}}}
+		}
+		"--user" = {
+			value = "$systemd_user$"
+			description = "Also show user (systemctl --user) units."
 		}
 	}
 }