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How to accurately diagnose the Actros gear problem?

I own a Mercedes Actros 2640 with tiptronic gearbox. When you drive it changes gears to a certain extent then disengages, after a while it will go but then does the same again. The other problem is that when shifting to manual it completely does not respond. I changed the clutch kit thinking that was a problem but it never helped

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  • 63 Answers

Check the oil level

Posted on Dec 20, 2018

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Remove the starter motor and check if there is a circular black plastic bung behind it, if there is remove the bung drill a hole through it approximately 10mm alternatively if doesn’t have the bung you can drill a hole in the O/S of the gearbox bell housing (meant to be drilled to 11.9mm but 10mm is fine) the reason for the disengagement is over pressure in the bell housing bizarrely causing the clutch to disengage.

Based on the other problem you describe sounds like a TCM fault, there was a recall on the TCM (if your truck has had it the 2 plugs on the TCM will be facing towards the front of the truck, if it hasn’t there would be 1 plug facing towards the front and 1 facing towards the back), if your truck has had the recall it would be worth booking into a dealer and try to push for parts warranty as the TCM selects the gears and operates the clutch.

Also on looking back at your question, after replacing the clutch the vehicle does require a teach in?
In a worse case scenario you’ll have to fork out for a TCM

Posted on Dec 08, 2018

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Posted on Jan 02, 2017

short shadey

jeff r

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SOURCE: automatic tiptronic gearbox sometimes sticks

have you had any transmission services done yet? like a flush sounds like a sticking solenoid but very hard to say with out looking into it please rate -jeff

Posted on Sep 01, 2008

ASEtech

Steve

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SOURCE: my clutch goes straight to the floor, cant shift gears

The most likely cause of your problem is a hydraulic system problem. Your clutch system works off of hydraulic pressure and if there is a leak or it ran out of fluid it will cause the problem you have. The first thing to do is check the master cylinder to be sure that it is full of fluid. If it is not then you have a leak somewhere.
You could have a problem with either your master cylinder or slave cylinder.

Posted on Dec 04, 2008

glenn chambers

  • 84 Answers

SOURCE: Allroad Tiptronic Gearbox "holding" gears before changing up.

Have you had the vehicle put on a diagnostic machine, does the car feel slugish, any lack of power, we have seen a lot of these vehicles with air mass sensor faults. When they fail they do not show a code but with the right scanner they can be seen not working. This affects the gearchange because the ecu does not have the correct data to shift. Of course it could also be the transmission is in need of overhaul. but i would take it to a good diagnostic garage first. It is not uncommon for the air mass sensor to fail after it has been disturbed or knocked in the workshop. we have never found out why.

Posted on Dec 20, 2008

Anonymous

  • 14 Answers

SOURCE: 2000 Mercedes-Benz Mercedes Benz E320 Cdi Automatic

have yor dealer check for updated software for your transmission or engine control modules

Posted on Mar 02, 2009

Zaza Gatenashvili

  • 22 Answers

SOURCE: Mercedes c class with tiptonic gearbox. It seems

It seems oil level is low in your gearbox, and it most likely leaking from adapter bushing ( where cable is connected to gearbox).
You need to replace seals or complete bushing and correct oil level.
Better if you visit your mechanic.

Posted on Oct 20, 2009

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