As of Release 4.6C, the following new Benefits services give employees access to benefits information online:
No specific Customizing is required for the Retirement Benefits service other than setting up the retirement plans themselves. If you want to implement the Spending Account Claims service, however, you need to make general settings in the Benefits Implementation Guide in the step Employee Self-Service -> Set ESS Parameters.
For more in information on retirement plan administration, which is new in Release 4.6C, see the release note Retirement Plan Administration.