Getting ready for trip on my 2011 Sprinter View and when I turn key, often nothing happens. Would normally think about bad starter solenoid but don't know where that is on Sprinter. If I continue to try sometimes once or twice and sometimes over a dozen and fiddle with parking brake and regular brake and anything else I can touch. Afraid I will get stranded if I don't figure out before trip? Sometimes starts on first key turn? Any thought please. No Sprinter dealer near me.