Sprinter repair near Ventura County

These are dealers for larger Freightliner trucks, not Sprinter vans...

Are you sure? Did you contact each one of these Freightliner dealers and ask them if they can service a Sprinter? Google 'Freightliner Sprinter Van repair service in Los Angeles' and at least ten places come up including some that also service Freightliner's other products. Just because they are not in the website does not mean they are not in Los Angeles. This is disappointing to me that the OP does not take it upon him/herself to do a search or to even ask the Dodge dealers who they refer Sprinter vans to for repairs. It seems that the OP just takes a simple 'no' from the Dodge dealers and walks away without asking for a little help. The OP cannot possibly be the only Freightliner Sprinter van owner in Los Angeles greater metro area that has needed some service and asked a Dodge dealer for a referral.