2013 E350 RWD 722.9 Transmission Issues
Thread Starter
Junior Member
Joined: Aug 2020
Posts: 40
Likes: 16
From: Danville, CA
2013 E350
2013 E350 RWD 722.9 Transmission Issues
Hi All,
My sedan has 85k miles, and perfect maintenance record. I had it checked out by a qualified MB indy mechanic before purchase last year.
Within the first 150 miles, I had had my coolant temp soar to MAX, so the car was immediately stopped and towed.
The cause? The trany oil cooler in the coolant radiator developed a leak and theh engine coolant was forced into the transmission.
Now I have what I think is not so much a hard shifting issue, but a slipping in 5 to 7th gears. It feels like running over rumble strips constanting, yet the pavement is smooth.
I presume this was damage done when the engine coolant entered the transmission. The friction discs material was damaged.
The trnasmission was flushed 3 times. , but no change.
I am guessing that a total overhaul or replacement is in my near future.
Anybody have this experience?
My sedan has 85k miles, and perfect maintenance record. I had it checked out by a qualified MB indy mechanic before purchase last year.
Within the first 150 miles, I had had my coolant temp soar to MAX, so the car was immediately stopped and towed.
The cause? The trany oil cooler in the coolant radiator developed a leak and theh engine coolant was forced into the transmission.
Now I have what I think is not so much a hard shifting issue, but a slipping in 5 to 7th gears. It feels like running over rumble strips constanting, yet the pavement is smooth.
I presume this was damage done when the engine coolant entered the transmission. The friction discs material was damaged.
The trnasmission was flushed 3 times. , but no change.
I am guessing that a total overhaul or replacement is in my near future.
Anybody have this experience?
Out Of Control!!
Joined: Sep 2018
Posts: 14,666
Likes: 4,568
From: unbegrenzt
2017 GLE350 4MATIC
Coolant in the transmission is problematic.
The friction surfaces of all clutches and brakes have been contaminated and the hydraulic control system has as well. It might be chasing issues endlessly or require a new transmission. Definitely get multiple opinions.
The friction surfaces of all clutches and brakes have been contaminated and the hydraulic control system has as well. It might be chasing issues endlessly or require a new transmission. Definitely get multiple opinions.
Last edited by chassis; Mar 31, 2021 at 07:26 PM.
Thread Starter
Junior Member
Joined: Aug 2020
Posts: 40
Likes: 16
From: Danville, CA
2013 E350
Coolant in Transmission
I agree, Chassis, I am allso wondering if my Xentry Star C4 will capture live engine rpm, shift points, vehicle speed,to confirm where the fault lies.
If my rpms are fluctuating in a particular gear, it might indication friction disc slipping. Maybe it doesn't matter but it would be interesting to know if this function exists in Xentry.
So far, I can't find it.
Thank you.
If my rpms are fluctuating in a particular gear, it might indication friction disc slipping. Maybe it doesn't matter but it would be interesting to know if this function exists in Xentry.
So far, I can't find it.
Thank you.
Out Of Control!!
Joined: Sep 2018
Posts: 14,666
Likes: 4,568
From: unbegrenzt
2017 GLE350 4MATIC
I agree, Chassis, I am allso wondering if my Xentry Star C4 will capture live engine rpm, shift points, vehicle speed,to confirm where the fault lies.
If my rpms are fluctuating in a particular gear, it might indication friction disc slipping. Maybe it doesn't matter but it would be interesting to know if this function exists in Xentry.
So far, I can't find it.
Thank you.
If my rpms are fluctuating in a particular gear, it might indication friction disc slipping. Maybe it doesn't matter but it would be interesting to know if this function exists in Xentry.
So far, I can't find it.
Thank you.
Since you have changed fluid three times I’m not sure what the next inexpensive step could be.
