diff --git a/gitlab/v4/objects/merge_trains.py b/gitlab/v4/objects/merge_trains.py
index 9f8e1dff0..e41520d83 100644
--- a/gitlab/v4/objects/merge_trains.py
+++ b/gitlab/v4/objects/merge_trains.py
@@ -1,9 +1,16 @@
 from gitlab.base import RESTManager, RESTObject
 from gitlab.mixins import ListMixin
+from gitlab import cli
+from gitlab import exceptions as exc
+from typing import Any, Dict, Optional, Union
+
+import requests
 
 __all__ = [
     "ProjectMergeTrain",
     "ProjectMergeTrainManager",
+    "ProjectMergeTrainMergeRequest",
+    "ProjectMergeTrainMergeRequestManager",
 ]
 
 
@@ -11,8 +18,75 @@ class ProjectMergeTrain(RESTObject):
     pass
 
 
+class ProjectMergeTrainMergeRequest(RESTObject):
+    _id_attr = "merge_request_iid"
+
+
 class ProjectMergeTrainManager(ListMixin, RESTManager):
     _path = "/projects/{project_id}/merge_trains"
     _obj_cls = ProjectMergeTrain
     _from_parent_attrs = {"project_id": "id"}
     _list_filters = ("scope",)
+
+
+class ProjectMergeTrainMergeRequestManager(RESTManager):
+    _path = "/projects/{project_id}/merge_trains"
+    _obj_cls = ProjectMergeTrainMergeRequest
+    _from_parent_attrs = {"project_id": "id"}
+
+    @cli.register_custom_action(
+        "ProjectMergeTrainMergeRequestManager",
+        (),
+        (
+            "when_pipeline_succeeds",
+            "squash",
+            "sha",
+        )
+
+    )
+    @exc.on_http_error(exc.GitlabCreateError)
+    def add(
+            self,
+            merge_request_iid: Union[str, int],
+            when_pipeline_succeeds: Optional[bool] = None,
+            squash: Optional[bool] = None,
+            **kwargs: Any
+    ) -> Union[Dict[str, Any], requests.Response]:
+        """Attempt to merge changes between source and target branches into
+            `/projects/:id/merge_trains/merge_requests/:merge_request_iid`.
+
+        Args:
+            merge_request_iid: merge request id of the MR
+            when_pipeline_succeeds: if true, the merge request is added to the merge train when the pipeline succeeds.
+                                    When false or unspecified, the merge request is added directly to the merge train.
+            squash: If true, the commits are squashed into a single commit on merge.
+            **kwargs: Extra options to send to the server (e.g. sudo)
+
+        Raises:
+            GitlabCreateError: If cannot add mr to merge train
+        """
+        path = (
+            f"{self.path}/merge_requests/{merge_request_iid}"
+        )
+        data: Dict[str, Any] = {}
+        if when_pipeline_succeeds:
+            data["when_pipeline_succeeds"] = True
+        if squash:
+            data["squash"] = True
+        return self.gitlab.http_post(path, post_data=data, **kwargs)
+
+    @cli.register_custom_action("ProjectMergeTrainMergeRequestManager")
+    @exc.on_http_error(exc.GitlabGetError)
+    def get_mr(self, merge_request_iid: Union[str, int],  **kwargs: Any) -> Union[Dict[str, Any], requests.Response]:
+        """Attempt to merge changes between source and target branches into
+            `/projects/:id/merge_trains/merge_requests/:merge_request_iid`.
+
+        Args:
+            merge_request_iid: merge request id of the MR
+            **kwargs: Extra options to send to the server (e.g. sudo)
+
+        Raises:
+            GitlabGetError: If cannot be merged
+        """
+        path = f"{self.path}/merge_requests/{merge_request_iid}"
+        return self.gitlab.http_get(path, **kwargs)
diff --git a/gitlab/v4/objects/projects.py b/gitlab/v4/objects/projects.py
index a139f312f..994fe39e8 100644
--- a/gitlab/v4/objects/projects.py
+++ b/gitlab/v4/objects/projects.py
@@ -66,7 +66,7 @@
     ProjectApprovalRuleManager,
 )
 from .merge_requests import ProjectMergeRequestManager  # noqa: F401
-from .merge_trains import ProjectMergeTrainManager  # noqa: F401
+from .merge_trains import ProjectMergeTrainManager, ProjectMergeTrainMergeRequestManager  # noqa: F401
 from .milestones import ProjectMilestoneManager  # noqa: F401
 from .notes import ProjectNoteManager  # noqa: F401
 from .notification_settings import ProjectNotificationSettingsManager  # noqa: F401
@@ -196,6 +196,7 @@ class Project(RefreshMixin, SaveMixin, ObjectDeleteMixin, RepositoryMixin, RESTO
     members_all: ProjectMemberAllManager
     mergerequests: ProjectMergeRequestManager
     merge_trains: ProjectMergeTrainManager
+    merge_trains_merge_request: ProjectMergeTrainMergeRequestManager
     milestones: ProjectMilestoneManager
     notes: ProjectNoteManager
     notificationsettings: ProjectNotificationSettingsManager