Diesel Forum Forum for Diesel engine vehicle related discussion

E320-40.7mpg commuting but rolling down hills

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old 08-11-2008, 05:02 PM
  #1  
ekm
Member
Thread Starter
 
ekm's Avatar
 
Join Date: Apr 2007
Location: Doylestown (Bucks County) PA
Posts: 83
Received 1 Like on 1 Post
2015 ML250, 06 E320 CDI, 2008 GL320 (sold)
E320-40.7mpg commuting but rolling down hills

Hello all,

I only tried this twice... I commute 55 miles to work each day and typically hit 35-36 mpg on the trip computer with ac off. 15 minute city driving, 45 minutes highway driving. Highway speeds are 70-75mph with minimal traffic.

If I put the car in neutral and roll down the steeper hills, I can hit 40.7mpg. Both trail days hit the same mpg.

Does anyone know if the transmission will be damaged by this practice?

Thanks for any input....Ed
Old 08-11-2008, 05:51 PM
  #2  
MBWorld Fanatic!
 
Untertürkheim's Avatar
 
Join Date: Mar 2007
Posts: 2,408
Likes: 0
Received 0 Likes on 0 Posts
I would not do it, automatic transmissions are not made to engage or disengage at speed.
Old 08-11-2008, 07:28 PM
  #3  
Super Member
 
TMAllison's Avatar
 
Join Date: Jun 2008
Location: Bay Area, CA
Posts: 835
Likes: 0
Received 1 Like on 1 Post
09' E320
IIRC my 99's OM says don't coast in N; unless to a stop. We have the same trans.
Old 08-11-2008, 11:30 PM
  #4  
MBWorld Fanatic!
 
harkgar's Avatar
 
Join Date: Apr 2006
Location: Toronto
Posts: 1,332
Likes: 0
Received 4 Likes on 4 Posts
2006 E320 CDi, 2008 3/4 Ton Suburban, 2007 "rice rickshaw" Accord 5 speed
Originally Posted by TMAllison
IIRC my 99's OM says don't coast in N; unless to a stop. We have the same trans.
The fuel savings must be marginal. Two negative points.

When you are free-wheeling you can only steer but unable to accelerate out of a dangerous situation.

There is also the risk of transmission damage. The only car in the last 30 years or so with this feature is the Saab 96 manual transmission. There was this funny little level on the floor that can be pulled out - pushed in to engage or disengage this feature. Crappy car. I had one.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: E320-40.7mpg commuting but rolling down hills



All times are GMT -4. The time now is 04:08 AM.