cruise control on 1991 Mercedes-Benz 350SDL

My cruise control works but it will not stay engaged for more than a minute. Any thoughts?

by in Bedford, VA on July 14, 2010
1 answer 1 comment
ANSWER by , July 14, 2010
This is likely a vacuum operated cruise control system, so check the system thoroughly for vacuum leaks.
COMMENT by , July 15, 2010
ok thanks!