Won't go in drive

Jan 31, 2021 | 02:11 PM

C_DirtyTwo

Thread Starter

MBWorld Fanatic!

Joined: Sep 2008

Posts: 1,660

Likes: 21

From: Orange County

a land yacht.

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

Jan 31, 2021 | 06:14 PM

E55Greasemonkey

MBWorld Fanatic!

Joined: Jul 2012

Posts: 4,509

Likes: 1,513

From: Orbiting the planet

This place is a joke.

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

Jan 31, 2021 | 07:40 PM

JAYCL600

MBWorld Fanatic!

Joined: Dec 2001

Posts: 3,704

Likes: 28

From: 20854

new balance

ive experienced this

Feb 1, 2021 | 02:14 PM

Roverron

Super Member

Joined: Dec 2009

Posts: 848

Likes: 6

From: New Cumberland, PA

ML63

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

Feb 1, 2021 | 06:40 PM

C_DirtyTwo

Thread Starter

MBWorld Fanatic!

Joined: Sep 2008

Posts: 1,660

Likes: 21

From: Orange County

a land yacht.

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

Feb 1, 2021 | 09:25 PM

PeteyV

Super Member

Joined: Aug 2004

Posts: 791

Likes: 37

From: Detroit Area

W203 C230, W210 E350, W166 ML63

Quote:

Originally Posted by C_DirtyTwo

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.

Feb 20, 2021 | 09:38 PM

AKnight55

MBWorld Fanatic!

Joined: Dec 2005

Posts: 6,759

Likes: 96

From: NH

2012 C63 BS & 2014 E63 Estate & 2008 CLK63 BS

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

6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

Verdad Gallardo

Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

Verdad Gallardo

Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

Verdad Gallardo

8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

Verdad Gallardo

Flawlessly Restored Mercedes 190E Evo II Heads to Auction

Verdad Gallardo

Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

Verdad Gallardo

Mercedes EQS Gets A Major Update: Everything You Need to Know

Verdad Gallardo

5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

Verdad Gallardo

Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

Verdad Gallardo

10 Most Reliable Mercedes-Benz Models You Can Buy Used

Verdad Gallardo

May 31, 2022 | 05:44 AM

Gio Sayah

Junior Member

Joined: May 2022

Posts: 16

Likes: 6

ML 350 2013

Quote:

Originally Posted by AKnight55

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

Quote:

Originally Posted by Doubleredrolex

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.