Remove door skin. See that both motor terminals have +12V on them normally, measured to the door frame metal. Use a test lamp, that puts a load on it to make sure it's actually got current ability and not just leakage. One or the other terminal is grounded to make the motor go, depending on direction. If you don't have +12V, you have a problem. 99% of the time it's dirty switches.
-- Jim _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com