Originally Posted by Dmarcian
Be curious to hear about the check engine light. Have you checked DEF fluid level?
The warning says "Auxiliary Battery Malfunction"
Apparently there's a small battery under the passenger seat that ensures some of the safety functions, still work even if the starter battery dies. Mercedes calls this the auxiliary battery.
The dealer disconnected the starter battery so it wouldn't discharge while the RV was sitting on the lot, but didn't realize that on the newer model sprinters you also have to pull fuse 32 or the auxiliary battery discharges. Both of the new Views we looked at had this problem.
The dealer told us we need to go to Mercedes and get the battery checked/replaced as warranty work.