DIY mechatronic replacement, hard?

JimboTD5

Registered User
Hi guys new on here,
Just bought my 2010 S4 and surprise surprise the mechatronic unit has started to play up. It’s under warranty but reading between the lines I don’t think they’ll cover this so I’m thinking of attacking it myself, at least I know it’s done right then too. I’ve found a guy fairly local that overhauls the unit for around £350, so it’s just a case of getting it on and off, is it difficult? Any tips?
Looks fairly straight forward on a guide I found?
 

Dippy

Registered User
I can't remember for sure but I think someone posted a DIY on this over on Audizine.
 

JimboTD5

Registered User
Hesitant in first and second when not coming to a complete stop or in slow moving traffic as if it doesn’t know what gear it’s in, hard downshift from 2-1 sometimes, reversing uphill is practically impossible it jumps out and starts rolling forward or just sits there revving, sometimes get an odd clunk between gears.
 

MarkWizard

Active Member
VCDS Map User
That's similar to what my A5 3.0 TDI Cab was doing, eventually got the garage to buy it back from me. Mine would lurch forward as it changed down from 2nd to 1st and would either stall, leave you sticking out of a junction or worse and do both!
 

JimboTD5

Registered User
I did see that but doesn’t really answer my question I want to do the work myself and change the control unit as I’ve been told that’s 98% the fault I have, I just need to find someone to take it out and put it back in for me but can’t find anyone local so thinking of having a go myself
 

razza1

Registered User
Who’s the warranty with, as most cover the mech unit?
Hopefully that is the case as otherwise it could be the clutches, gearbox specialists can replace.
Haven’t seen a manual but don’t think it’s too hard a job from what I hear...


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The Jargen

Registered User
Haven't done this on longitudinal layout before, but its a pretty straight forward job in fact it's easier on your car because you have more access.
 

JimboTD5

Registered User
A1 approved I believe it’s called? Been reading the paperwork and it seems I have to pay for all diagnostics etc first at Audi rates as I can’t find anyone else that’ll touch it, and in my eyes I’d rather put the 100 odd quid (maybe more?) towards just changing the damn thing myself and less hassle, I’m going to price up a new pcb from Audi and oil etc and weigh up my options I think as at a rough guess it’s only gonna cost me about 4-500 quid including the fresh oil/filter.
 

Black Pearl

Registered User
I did this job in my garage on a set of car ramps. The unit is heavy inside and its messy. The hardest part was fitting it back in as you have to line everything up, also hold the unit with one hand whilst bolting it in. Try and find a heat resistant tube aswel as I melted a few on the cat filling up the fluid.
Try this thread it has some useful info.

http://www.audizine.com/forum/showt...-Service-DIY?p=12115786&posted=1#post12115786
 
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