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Vito 120
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Discussion Starter #1
Vito 120 2007 with 5 speed auto, van keeps locking in 3rd gear, mechanic (not MB) reset gearbox control module - said something about RPM sensing- and says it might need a new unit... at £2000.

Anyone know an aftermarket specialist for these, for possible repair/recon etc? Anyone know the make/model of gearbox or is it a MB item?

Based in N. london. Thanks.
 

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ML63 AMG & 2 350 SLK with AMG kit.
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It's all MB, 722.6 box.

Just get it on star at MB before anything for correct diagnoses.

How did it start? whats the milage? and when was the box last serviced?
 

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Vito 120
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Discussion Starter #3
Thanks for the reply. Sorry, I'd dump it in the thames and buy a renault rather than step inside another MB dealer.

Vans coming up for 5 years old, has 28k on the clock, does a lot of slow city traffic work and is serviced annually. The box itself has never been serviced as far as I'm aware.. I know this "sealed for life" idea is frowned upon but wouldn't have thought mine would need maintenance yet?

Fault occurred a few times over a month or so... ign off/on re set it, then it happened on friday and wouldn't re-set until I got it to the mechanic on sat.... done a few miles since and it's been fine.
 

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1. They aren't sealed for life, 1st trans service is recommended at the vehicles 1st maintenance service (2nd service) and then every 120,000kms after that. I've seen these boxes do over 500,000kms

2. 2k seems a bit steep fot that repair. If its just the conductor plate
 

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ML63 AMG & 2 350 SLK with AMG kit.
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Thanks for the reply. Sorry, I'd dump it in the thames and buy a renault rather than step inside another MB dealer.

Vans coming up for 5 years old, has 28k on the clock, does a lot of slow city traffic work and is serviced annually. The box itself has never been serviced as far as I'm aware.. I know this "sealed for life" idea is frowned upon but wouldn't have thought mine would need maintenance yet?

Fault occurred a few times over a month or so... ign off/on re set it, then it happened on friday and wouldn't re-set until I got it to the mechanic on sat.... done a few miles since and it's been fine.
At 28 k it should be fine, but if your not going to MB then you will not get any parts or diagnostic done on the box.
 

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Vito 120
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Discussion Starter #6
Thanks for replies, box is now having... the pressure sensor circuit board?.. replaced. Ouch.

At 28 k it should be fine, but if your not going to MB then you will not get any parts or diagnostic done on the box.
To be fair, the MB's diagnosis of a bosch battery that failed at 2 years old due to me "not driving it properly" (deduced by the odo showing 12k) and offering me a new one for £350 means it'd probably be cheaper for me to abandon it and buy a new van than ask them to look at a potential massive gearbox fault! My spine runs cold at the idea of going to them with that!
 

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Vito 120
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Discussion Starter #8
Sounds like you have a bad MB dealer, there not all bad, mine is great, Midland truck and vans, no problems there.
Thats true I guess, but surprisingly little choice of commercial MB service agents in london, given the amount of mb vans on the road here.

Anyway it's currently with an autobox specialist, which is probably where MB themselves would toss it if under warentee*, as few general mechanics touch autoboxes.

* (the out of warentee diagnosis being of course, a whole new gearbox, a fault created by me by driving it while wearing a grey shirt/black trouser combo)
 

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ML63 AMG & 2 350 SLK with AMG kit.
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MB would not repair it, they just replace the complete unit.

I first came to this forum with auto box problems on my V280, a few years ago.

At 35k it needed a gear box repair, it went to auto transmission specialists who claimed they could fix it, guess what, they couldn't in fact it was worse, 6 months later without the van and 6 dents and over a 1000 miles, 3 auto box companies gave up, it went to MB who fitted a new box, job done.
 

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Vito 120
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Discussion Starter #10
MB would not repair it, they just replace the complete unit.

I first came to this forum with auto box problems on my V280, a few years ago.

At 35k it needed a gear box repair, it went to auto transmission specialists who claimed they could fix it, guess what, they couldn't in fact it was worse, 6 months later without the van and 6 dents and over a 1000 miles, 3 auto box companies gave up, it went to MB who fitted a new box, job done.
I can believe they did that. I'd wager it'd have been different if your chequebook wasnt taking the abuse though.

In fairness it must be poor by design or have suffered catastrophic damage/neglect to need full replacement, surely? They have many intricate parts but conform to a pretty simple fundamental design. the biggest problem for me was mercs "interesting" implementation of CAN-BUS interface-ability but the man who did the job had STAR.
 

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ML63 AMG & 2 350 SLK with AMG kit.
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Mine was fixed at the supplying dealers cost as it started playing up with in a day of picking it up.
Over 4k to fix it!

The problem was they could not find the cause and where trying to fix a damage box, only to damage it again and again.
It turned out to be the ecu and wiring harness.
No problems with my 120 or my old 115 autos
 
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