Won't Start

[Electric Bob]

Went out to get the RV from storage today and after the glow plug warm up, turning the key did nothing. Tried it twice, and then turned it all the way off and repeated, and then started fine.
We have only had it a few months, but has never had this issue.
40 degree outside temp.

Any reason for concern?

[Winterbagoal]

Not common but has happened a few times before to others.
Some web hits including some on Sprinter Source with some tests you can do yourself.
https://www.google.com/search?source...client=gws-wiz

[KanzKran]

That used to happen to me often, until I started waiting just a second longer before engaging the starter. I think I was just getting ahead of the electronics, even though the glow plug light had gone out.