Mercedes-Benz Forum banner

61 - 80 of 117 Posts

·
Registered
Joined
·
1,593 Posts

·
Registered
Joined
·
1,593 Posts
Discussion Starter #63 (Edited)
Testing the blend air door flap function
MY 2002-05.

1) Remove glovebox compartment
2) Move the insulation blanket in the left upper corner. See picture for location of the actuator.
3) Video shows the control arms moving from one end to the other while switching the temp control from full cold to hot.

 

Attachments

·
Registered
Joined
·
1,593 Posts
Discussion Starter #65 (Edited)
Transmission leak at the connector
The infamous pilot bushing is the most common cause of the 722.6 leak. The original part 2035400053 should be replaced with the latest part number 2035400253. Even the new pilot bushing should be inspected for leaks during every transmission fluid change.
 

Attachments

·
Registered
Joined
·
153 Posts
Diagrams and Troubleshooting Docs.

:surrender:Hello Merzatt,
I want to personally thank you for being so kind to us "DIY's" (and others), as to provide such an array of helpful tools to use in locating and understanding different components in our dearly beloved rides. I have gained much from the service you've provided your fellow members.
Thank You,
Veloette-ML:bowdown:
 

·
Registered
Joined
·
54 Posts
Here is a very useful link about the 722.6 transmission. Feel free to post it for other models where the 722.6 transmission is used. This link it to a manual for the 722.6 transmissions with details of common problems.

722.6
 

·
Registered
Joined
·
1,593 Posts
Discussion Starter #69
Replacement of ECUs and adding keys

Guideline for replacing electronic control units and adding spare keys
for all Model Year 2000 - 2002 M-Class models.
 

Attachments

·
Registered
Joined
·
1,593 Posts
Discussion Starter #72
Maintenance of Torsion bar housing. Part numbers included in the document.

Worn out torsion bar support not only causes noises, but also lowers the front of the vehicle. Make sure the front and rear suspension are the same height after repair for the best ride quality and handling.
 

Attachments

·
Registered
Joined
·
1,593 Posts
Discussion Starter #77
Transmission Flush Myths- Busted!

Helpful information for those who believe in transmission myths.

From: Transmission Flush Myth

Anyone who is even remotely involved with cars has heard this type of story- someone that they know got a transmission flush and their transmission failed within weeks or even days.

The urban legend behind this is that the “sludge” is all that was holding the transmission together and once it was removed with a flush, the transmission had no chance of surviving.

The story goes like this:
Jim was having a transmission problem, let’s say that it was sluggish in the morning and would slip on take-off from a stop from time to time when it was hot out.

Now Jim has a brother-in-law named Bob that used to work on cars, do his own tune ups and oil changes, etc. When Jim mentioned the problem that he was having to Bob, his immediate response was, “You need to get that tranny flushed”

Of course Jim not really knowing anything about a car, much less an automatic transmission blindly follows the advice of his brother-in-law. After all Bob surely knows all about cars even though he hasn’t worked on one for over twenty years.

Jim obediently takes his car to the local lube place for a flush and an engine oil change while it’s there. Jim gets his transmission flush, pays and goes on his way.

At first, he notices maybe a slight improvement in performance but his transmission is still exhibiting most of the original symptoms.

About two weeks later Jim is driving to work and he stops to pay a toll. When he tries to pull away from the toll booth the unthinkable happens- the car just revs and goes nowhere, as if it is in neutral. Jim moves the shifter into low and is able to limp his car off to the side of the road and wait for a tow truck to take him to a transmission shop.

What happened?

Here’s a list of reasons why the transmission flush myth exists:

•The myth is propagated by people who claim to be experts. I have even heard of transmission repair shops who contribute to the myth in the hopes of scaring potential customers into having their transmission overhauled rather than maintaining it.

•There are thousands of “internet experts” who promote the misinformation- it’s truly a case of “monkey see, monkey do” on steroids!


•There may have been a time in the early days of automatic transmissions when failure after a flush was more common, perhaps because of antiquated friction material and transmission fluid technology during the 1950’s and 60’s but this was before my time so I’m not able to truly discuss the legitimacy of the possibility. I can, however, say with certainty that it’s not an issue with 99.9% of the vehicles in service today. If your owner’s manual is in the glove box and not painted on the wall of a cave, you are probably good to go.

•“Sludge” is all that was holding the transmission together and when it gets cleaned out the trans in going to fail immediately. Guess what? If you have sludge in your transmission, it’s already bad and in need of a repair.

•Once in a while a flush is performed, usually at a quick lube operation, and the transmission is not refilled correctly- resulting in failure soon thereafter. Of course the incorrect fluid level is not recognized as the culprit- the transmission flush is! Many automatic transmissions have fairly complicated fluid level checking and filling procedures that are best left to a transmission repair expert to perform.

•People have unrealistic expectations. A transmission flush is no more likely to fix a failing transmission than an engine oil change is to fix a major internal engine problem. Both of these things are great to do regularly but they are maintenance- not a fix for a problem.

•The reality is that most people don’t think about their transmissions until the day that they have a problem. Jim’s transmission was on borrowed time- it was going to fail anyway but now that it has, he is going to perpetuate the myth. If he ever hears someone mention a transmission flush, he’s going to proclaim, “I had that done and my transmission blew up within a month!”

I have been in the transmission repair industry since 1987 and can honestly say that I can’t recall a single time where I saw a healthy transmission get a flush or a fluid change and subsequently have a problem. A transmission flush is the best maintenance that one can do to extend the life of your automatic transmission, don’t miss out on the benefits because of the nonsense that exists surrounding changing your transmission fluid!

Anyone can feel free to repost this as long as you leave the "about the author" part intact.

About the author:
John Lombardo is co-owner of IPT Performance Transmissions and has been in the high performance industry for over 20 years.
 
61 - 80 of 117 Posts
About this Discussion
116 Replies
34 Participants
Carmel Vella
Mercedes-Benz Forum
BenzWorld.org forum is one of the largest Mercedes-Benz owner websites offering the most comprehensive collection of Mercedes-Benz information anywhere in the world. The site includes MB Forums, News, Galleries, Publications, Classifieds, Events and much more!
Full Forum Listing
Top