Won't go in drive
 

Occasionally in the morning my car won't go in drive, reverse, or neutral. Car is stuck in park. Have to turn the car off and on multiple times for it to finally go into drive or reverse. Anyone else experience this?

Thanks!

Car info:
2013 ML63
Race iQ tune
One step colder plugs
OBDII lowering module

Check your main battery. When they get weak the voltage drop during cranking confuses the ISM. (shift actuator)

ive experienced this

Check the battery in the rear. Mine was in the passenger side rear panel across from the subwoofer

Ok, that could make sense as it usually happens in the morning after sitting for a while.

If you have an issue shifting into gear from initial start; it’s likely the auxiliary battery.

If you’re going to do the replacement yourself, there is a bit of a short cut if you’re willing to put a cut into your cargo area carpet.

Yes happen on my old ml. Def the battery issue.

It’s the 2nd little 12v battery in the rear. The first symptom of it dying is the car not shifting out of park. Very common issue.

Hey lads, regarding the car stuck in P or not switching gear issue, Since some of you have already experienced this issue is it normal to have these 2 codes "P172A00 - The Direct Select Lever is Faulty." And "U1420 - CAN communication with thecontrol module "N80 (SCM/MRM)'" thrown in the scanner if the issue is due to a dying aux battery?
I tested my aux battery today it read 12.5 v with the car off and 14.5 v with it on. However my main battery shows 12.5 v while off and drops to 10v while crancking and goes back up to 14.5 with the car on.. Please any help is much appreciated.