[A45xxxllx]

Can be replaced，Because the things given are the same

Of course, it's safer to go to the dealer

 

[Theo]

@veeeight Could you please take under two seconds and find me the oil number for both our diff and gearbox? And gearbox filter. I need the OEM codes, i.e. I think gearbox oil is 236.21 but haven't been able to determine whether it's for the 8 or the 7-speed DCT. Anyways, if you have all three codes I'd really appreciate. And is it true there's no diff filter? Does it come without a filter or we just never change it?

 

[veeeight]

According to my list:

Rear Diff:
Gear set - M-B 235.63 - not in service schedule, "lubed for life" 😂
Coupling - M-B 235.64 - A0009894406
No diff filter. Left and Right coupling separate fills.



Gearbox (I'm not 100% sure of the parts below, so check with your dealer):
Filter - A2463772300
O Ring - A0229978045
ATF - M-B 236.22 - A0009896104

 

[Theo]

And if it wasn’t for this forum I wouldn’t have realised.

If it wasn't for this forum, come May I would've taken it in and they would've said that almost everything I needed for the service was out of stock. And I'd be on my way home, very pissed. I'm pissed now, but at least I feel a little better knowing I have saved myself a little time, having placed my order in advance. But I wonder if joining a forum is a prerequisite for owning this vehicle.

According to my list:

Rear Diff:
Gear set - M-B 235.63 - not in service schedule, "lubed for life" 😂
Coupling - M-B 235.64 - A0009894406
No diff filter. Left and Right coupling separate fills.



Gearbox (I'm not 100% sure of the parts below, so check with your dealer):
Filter - A2463772300
O Ring - A0229978045
ATF - M-B 236.22 - A0009896104

Much appreciated!

 

[fatty45]

All,

Owner of a 2021 CLA 45 with the TWIN torque vectoring rear axle and have been attempting to locate reliable, definitive service information for quite a while now without much success. I am an active member of another popular MB forum but, apparently, there are very few c118 CLA 45 enthusiasts in the U.S. so I’ll try posting here. Anyway, based on my research, the 45 uses a rear axle unit manufactured by Magna – the same supplier of nearly identical torque vectoring rear axles used on the new Audi RS3 and VW MK8 Golf R. While MB does not list a part number to coincide with the 235.63 specification (center section gear oil), I have access to VW’s erWin maintenance system and they spec the following for the Magna unit in the Golf R:

Center Section Gear Oil: G-060-190-A2
Clutch Oil: G-055-515-A2 (I have confirmed this is a cross to Shell TF 0870 & MB 000-989-440-611)

Finally, being an avid DIY’er for maintenance, I have a dedicated laptop running a very current version of Xentry (late 2022) and WIS lists no procedure for changing the rear axle oil – not for the center section gear set or clutch packs – but does state that it should be changed at 30,000 miles or 3 years (aware that this may have changed to 37,000 miles or 4 years).

So to summarize, I’m coming up on this service, am interested in DIY’ing it, but still need the following information if anyone can assist:

• The WIS procedure for changing the rear axle clutch and gear oil (potentially document #AP35.00-P-3501F if anyone feels like searching by document number in WIS)
• MB part number for the drain/fill plugs. VW seems to want all drain and fill plugs replaced when performing this service on the Golf R (all 6 of them – VW’s part number for the drain/fill plugs is N90281802; I’d be willing to bet these are the same for the 45’s rear as well but my version of EPC doesn’t cover the c118)
• Confirmation that the Golf R’s center section gear oil (G-060-190-A2) will suffice for MB’s 235.63 (75W80) gear oil spec.

Oh, one final note, the Golf R procedure in erWin suggests the clutch oil condition can be checked via diagnostic software and that the oil condition needs to be “reset” upon changing. It further states that driving style (read: driving aggressively) can drastically reduce the required service interval of the clutch packs. I have not verified if our rear axle is also digitally monitored.

 

[Turbo Ed]

All,

Owner of a 2021 CLA 45 with the TWIN torque vectoring rear axle and have been attempting to locate reliable, definitive service information for quite a while now without much success. I am an active member of another popular MB forum but, apparently, there are very few c118 CLA 45 enthusiasts in the U.S. so I’ll try posting here. Anyway, based on my research, the 45 uses a rear axle unit manufactured by Magna – the same supplier of nearly identical torque vectoring rear axles used on the new Audi RS3 and VW MK8 Golf R. While MB does not list a part number to coincide with the 235.63 specification (center section gear oil), I have access to VW’s erWin maintenance system and they spec the following for the Magna unit in the Golf R:

Center Section Gear Oil: G-060-190-A2
Clutch Oil: G-055-515-A2 (I have confirmed this is a cross to Shell TF 0870 & MB 000-989-440-611)

Finally, being an avid DIY’er for maintenance, I have a dedicated laptop running a very current version of Xentry (late 2022) and WIS lists no procedure for changing the rear axle oil – not for the center section gear set or clutch packs – but does state that it should be changed at 30,000 miles or 3 years (aware that this may have changed to 37,000 miles or 4 years).

So to summarize, I’m coming up on this service, am interested in DIY’ing it, but still need the following information if anyone can assist:

• The WIS procedure for changing the rear axle clutch and gear oil (potentially document #AP35.00-P-3501F if anyone feels like searching by document number in WIS)
• MB part number for the drain/fill plugs. VW seems to want all drain and fill plugs replaced when performing this service on the Golf R (all 6 of them – VW’s part number for the drain/fill plugs is N90281802; I’d be willing to bet these are the same for the 45’s rear as well but my version of EPC doesn’t cover the c118)
• Confirmation that the Golf R’s center section gear oil (G-060-190-A2) will suffice for MB’s 235.63 (75W80) gear oil spec.

Oh, one final note, the Golf R procedure in erWin suggests the clutch oil condition can be checked via diagnostic software and that the oil condition needs to be “reset” upon changing. It further states that driving style (read: driving aggressively) can drastically reduce the required service interval of the clutch packs. I have not verified if our rear axle is also digitally monitored.

@veeeight will address the Tier One supplier question.
I think you may well be correct re Magna in the VAG product; however, you are not where it comes to our W177 vehicles.

You MIGHT be able to use similar lubricants in both suppliers' components, however I wouldn't take that as gospel, that's for sure.

Simply order and use the MB P/N lubricants and definitely for where you live, change them all every six months.

 

[veeeight]

Number 1 reason for changing the A45s rear coupling sections (Left & Right) more often, as opposed to less often:

The A45s configuration and calibration is to give “more” rear drive feeling, say compared to a Golf 8R. So the rear coupling clutches (Left & Right) are experiencing more slip engagement more of the time. Slipping clutches in oil leads the oil to deteriorate quicker than non slipping clutches

The M-B spec oil for the rear couplings (Left & Right) is M-B 235.64 - A0009894406. 0.4 litres per side. Shell Equivalent TF0870 B. The “B” is different to the G8R non-B oil suffix? Does this make a huge difference? Don’t know.🤷‍♂️ But I would stick to the M-B part number above.

 

[Turbo Ed]

Number 1 reason for changing the A45s rear coupling sections (Left & Right) more often, as opposed to less often:

The A45s configuration and calibration is to give “more” rear drive feeling, say compared to a Golf 8R. So the rear coupling clutches (Left & Right) are experiencing more slip engagement more of the time. Slipping clutches in oil leads the oil to deteriorate quicker than non slipping clutches

The M-B spec oil for the rear couplings (Left & Right) is M-B 235.64 - A0009894406. 0.4 litres per side. Shell Equivalent TF0870 B. The “B” is different to the G8R non-B oil suffix? Does this make a huge difference? Don’t know.🤷‍♂️ But I would stick to the M-B part number above.

LOL!!
I'll second that!!
Particularly as I have A LOT of personal experience in the ME and know HOW they use their vehicles, in addition to the ambient conditions.

Was our friend in the ME correct regarding Magna being the Tier One on the VAG differential assemblies?

 

[veeeight]

Was our friend in the ME correct regarding Magna being the Tier One on the VAG differential assemblies?

Yes Magna is supplier for G8R and RS3 rears.

With respect to A45s it’s more murky! - I was always told that that AMG did the development with Steyr - but of course Magna bought Steyr. But more likely AMG worked with Steyr OE in-house engineers, so the calibration IP of Audi and AMG would not be available to each other.

But neither AMG nor Magna have ever declared in public that Magna supply the A45s rear unit, or that it is the same unit as in G8R/RS3, only a couple of motoring journalists have put 2&2 together and maybe come up with 5.

So could they share a casing? Possibly. Internals? Possibly very similar. Or they could be different units!

M-B has no service schedule for the actual centre gear set though. ie no replacing of the oil, which they say “isn’t available” (M-B 235.63). VW/Audi has. 🤷‍♂️

 

[Turbo Ed]

Yes Magna is supplier for G8R and RS3 rears.

With respect to A45s it’s more murky! - I was always told that that AMG did the development with Steyr - but of course Magna bought Steyr. But more likely AMG worked with Steyr OE in-house engineers, so the calibration IP of Audi and AMG would not be available to each other.

But neither AMG nor Magna have ever declared in public that Magna supply the A45s rear unit, or that it is the same unit as in G8R/RS3, only a couple of motoring journalists have put 2&2 together and maybe come up with 5.

So could they share a casing? Possibly. Internals? Possibly very similar. Or they could be different units!

M-B has no service schedule for the actual centre gear set though. ie no replacing of the oil, which they say “isn’t available” (M-B 235.63). VW/Audi has. 🤷‍♂️

@veeeight, are you able to identify which of the Magna Europe plants builds the rear axle assembly in the VAG product?

 

[Forrester]

Guys you’re going to start giving the molecular structure of each oil type next 😂

 

[veeeight]

@veeeight, are you able to identify which of the Magna Europe plants builds the rear axle assembly in the VAG product?

No, I don't know. If I were to guess, Graz. But that's a guess. Low-Res drawings of the rear drives of the G8R and A45s show the mounts and casings look different. So maybe just similar internals? After all, there only a limited number of ways you can get a twin clutch and hypoid gear set to look

and WIS lists no procedure for changing the rear axle oil – not for the center section

M-B do not have a schedule or procedure for changing the centre hypoid gear set oil. "Lubed for Life"........ and do not list any products for 235.63 oil. I dare say that regular changes of a good quality 75W80 Hypoid oil will be suitable, if you are so inclined

 

[Turbo Ed]

No, I don't know. If I were to guess, Graz. But that's a guess. Low-Res drawings of the rear drives of the G8R and A45s show the mounts and casings look different. So maybe just similar internals? After all, there only a limited number of ways you can get a twin clutch and hypoid gear set to look




M-B do not have a schedule or procedure for changing the centre hypoid gear set oil. "Lubed for Life"........ and do not list any products for 235.63 oil. I dare say that regular changes of a good quality 75W80 Hypoid oil will be suitable, if you are so inclined

The A45S rear axle assembly definitely comes from Graz, out of what used to be the Steyr plant, before the takeover.

Your Hypoid gear set oil is precisely what I use.

 

[Turbo Ed]

Guys you’re going to start giving the molecular structure of each oil type next 😂

Well, that would be more useful than OEM Marketing Dept service schedules and processes!!

 

[Forrester]

I know that the A45s rear diff is considerably different to that of the A45 first gen but we had to have the diff oil changed on that from the very beginning. I'm trying to recollect if it started at 1500 miles or just the first service. But my point is that I just don't believe that MB has made such a step change in the operation of the rear diff that they can now stretch the first oil change to potentially 4 years. There must be bedding in wear and the oil from that period surely should be changed sooner than 4 years.

 

[Theo]

Ok so I picked up 6lt of ATF - M-B 236.22 - A000989610409 and I was told it takes up 5.something.

Now on to the diff left and right section oil, DCT filter etc, and plugs... and let the wait begin (hope not).

 

[fatty45]

To serve as a reference, the Magna unit in the RS3 and Golf R appear to be identical, down to the case design, internals, control units and mounting points:

The Magna unit for MB seems to have been put together slightly differently (I'm assuming for packaging considerations) with the most obvious being a different case design, different mounting points, and the passenger-side control unit is clocked differently.

So whether or not they all use the same oils for the gear sets and clutch packs, I don't know (but I strongly suspect the internals are nearly the same, if not identical). One additional thought: even if the internals are identical, different programming of the units by Audi, VW & MB to illicit different behaviors may very well necessitate different operating fluids.

 

[Theo]

They behave differently for sure. Our cars are a lot more rear-biased, to the point of becoming scary on worn tires (Race mode, ESP-sport). But it's so satisfying to be able to break traction so easily, exiting roundabouts and u-turns being my favorite spots and you don't need drift mode either, Race mode will do. Needless to say people are often impressed seeing a hatchback do that. And we get that with only a 50% to the rear, that's even more impressive.

 

[fatty45]

For anyone interested, I'm attaching the oil level check and change procedure from erWin for the Golf R unit. Other than the resetting the oil adaptation values with diagnostic software, it appears to be a pretty straightforward procedure on the VW.

 

[Turbo Ed]

They behave differently for sure. Our cars are a lot more rear-biased, to the point of becoming scary on worn tires (Race mode, ESP-sport). But it's so satisfying to be able to break traction so easily, exiting roundabouts and u-turns being my favorite spots and you don't need drift mode either, Race mode will do. Needless to say people are often impressed seeing a hatchback do that. And we get that with only a 50% to the rear, that's even more impressive.

Which is all the more reason for sticking with AMG's P/N 's for lubricants.

The small amount which one may save by using those recommended for the VAG variants of the rear axle assembly is simply a false economy.