What model rear diff oil needs to be replaced ？75W-85？75W-90or75W-140？
A45s Rear Diff Noises, Oil and Oil Changes
A45xxxllx
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Turbo Ed,
I'm certainly not suggesting that one should substitute VAG lubricants for the MB spec'd part numbers; however, in the case of our rear axle, MB lists "no products available" for the hypoid chamber oil (MB spec 235.63, 75W80). Therefore, as a DIY'er and one who does not necessarily subscribe to "lifetime" fluid fills, I'm searching similar units from the same manufacturer in hopes of finding a suitable oil. Most of the commercially available 75W80 oils I have come across are manufactured for manual transmissions, and many even state on the bottle, "not suitable for hypoid gears."
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75w80 Synthetic Gear / Diff Oil GL-5
Fully Synthetic 75w80 Premium Gear / Differential Oil Fully synthetic gear oil is a high performance product manufactured from a blend of synthetic oils, sheer stable viscosity index improvers and a multipurpose extreme pressure additive system. It offers a high level of performance when...
www.westwayoils.co.uk
As usual, @veeeight has nailed it in his post.
Precisely what I use.
I would recommend my manufacturer, however it is an Australian lubrication company, so no use to you in the ME or our European members.
I note with interest @veeeight has also recommended a specialty lubrication company, however more conveniently based in the UK.
They may well export to the ME.
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I usually use Smith and Allan Lubricants, in the UK, but they don’t list that particular GL-5 Hypoid Oil.
veeeight,75w80 Synthetic Gear / Diff Oil GL-5
Fully Synthetic 75w80 Premium Gear / Differential Oil Fully synthetic gear oil is a high performance product manufactured from a blend of synthetic oils, sheer stable viscosity index improvers and a multipurpose extreme pressure additive system. It offers a high level of performance when...
Can you articulate your reasoning for recommending a GL-5 oil vs. GL-4 for this application (most 75W80 oils I've come across are GL-4 spec)? Just curious as I see Westway Oils offers their 75W80 in both specifications. Thanks!
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My recollection is that GL-5 EP additives withstand higher pressures, so in a closed diff application like a rear axle it probably lasts longer.
But in reality the differences are probably marginal in the A45s application, I mean if you're talking commercial truck rear axles and loads, that's probably more relevant.
But in reality the differences are probably marginal in the A45s application, I mean if you're talking commercial truck rear axles and loads, that's probably more relevant.
No use to members in Europe or the ME; however, all my vehicles use Penrite oils, formulated right here in Melbourne and who know only too well the demands of our environment. Have used their GL-5 in all my differential assemblies, including the 1500 HP Ute, for years.
Can I ask what the A35 unit is and, if VW can offer the same for the Golf R/S3 and the RS3, why can't MB.
Forrester,
While I can't fully answer your question (manufacturer, model number, etc.), WIS lists two rear differentials for the 118 and 177: the base differential "except models xxx.353/.354/.653/.654" (i.e. -45 & -45s), and the TWIN torque vectoring rear "models xxx.353/.354/.653/.654." Below is a picture from WIS of the base differential showing one drain and one fill plug:
So it would appear as the -35 shares the same rear differential as the base -250. For reference, the changing procedure calls for 0.6L fill capacity, renewing the drain and fill plugs, and torqueing both to 35 nm.
Thank you.
It appears that MB have cut corners in not offering the same diff on the A35 as the A45s. Whereas the VW group seem to have not, by offering the lower powered R and S3 the same as the RS3.
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Picked up a few things that arrived recently, don't really know when, I didn't get a call as I explicitly requested. Perhaps they didn't think I needed it, as I ought to have upgraded myself to the 6th sense. So I called them instead.
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The little box is listed as the oil cooler filter and the bigger ones as oil filters.
The little o-ring on the left is listed as an o-ring seal (profile) and the bigger ones as o-rings.
And now we come to what really worries me, the diff oil. As you can see they gave me the 235.15 approval which, as I've been reading here, is not the right one for our twin clutch system. I looked in the bag just to make sure, and I immediately asked why it's not the 235.64 which is the right one based on what I've read. They went like "where did you find that info" typical dealership response like I'm some dumbass clueless rich dude owning a six figure car, not supposed to worry about anything going into the engine and other components, and I said "from owners in the UK, that's the one they use". Guy said, "so that's what they use in the UK, it's country-specific". I said, so how come we use the same engine oil 0W-20, no matter if I have personally decided to stick to the AMG 0W-40 as I would use the 20 to boil my spaghetti in our blazing hot summer, the 0W-20 is still the recommended one, which is the same in both countries. So same engine oil but we use different diff oil? doesn't make much sense. He said he would run another check based on my VIN, but I don't think that is going to change anything as all orders are based on VIN in the first place. Perfect...
I have sent MB an inquiry, asking which is the right diff oil approval for my car and in my region.
Waiting for their response.
The little box is listed as the oil cooler filter and the bigger ones as oil filters.
The little o-ring on the left is listed as an o-ring seal (profile) and the bigger ones as o-rings.
And now we come to what really worries me, the diff oil. As you can see they gave me the 235.15 approval which, as I've been reading here, is not the right one for our twin clutch system. I looked in the bag just to make sure, and I immediately asked why it's not the 235.64 which is the right one based on what I've read. They went like "where did you find that info" typical dealership response like I'm some dumbass clueless rich dude owning a six figure car, not supposed to worry about anything going into the engine and other components, and I said "from owners in the UK, that's the one they use". Guy said, "so that's what they use in the UK, it's country-specific". I said, so how come we use the same engine oil 0W-20, no matter if I have personally decided to stick to the AMG 0W-40 as I would use the 20 to boil my spaghetti in our blazing hot summer, the 0W-20 is still the recommended one, which is the same in both countries. So same engine oil but we use different diff oil? doesn't make much sense. He said he would run another check based on my VIN, but I don't think that is going to change anything as all orders are based on VIN in the first place. Perfect...
I have sent MB an inquiry, asking which is the right diff oil approval for my car and in my region.
Waiting for their response.
The photo shows 235.15 for the diff oil. Which I presume MB in Germany thought was correct.
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9,121 Posts
No no no! Stop! No more muddying!!!!
M-B Germany does not think 235.15 is the correct oil for A45s!!!!
The following Mercedes website is what M-B Germany thinks should go into the rear diff twin clutch coupling…..
See
Mercedes-Benz Operating Fluids
Publication platform for approved operating fluids from Mercedes-Benz
operatingfluids.mercedes-benz.com
@Theo you can show that website ^ to your dealer.
Scroll down till you find:
“Axle gear oils, sheet 235.64 for TWIN rear axle differential rear axle for coupling, model 177 and 118 with engine 139”
235.64
235.64
235.64
235.64
235.64
235.64
And as the Dragon’s say… “I’m out” 😂 😂
*In true Mercedes style, that sheet has an error as it talks about a 9-F DCT for the W177 model
Unless @steve_3939 - has the A45s FL got a 9 speed gearbox?
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I’ve just noticed something in that document re the earlier discussion about GL-4 and GL-5 spec oils:
“However, the hypoid gear oils must at least correspond to the US military specification MIL-L-2105 B/C/D and must be classed GL-5 in the quality grade according to API (American Institute of Petroleum).”
“However, the hypoid gear oils must at least correspond to the US military specification MIL-L-2105 B/C/D and must be classed GL-5 in the quality grade according to API (American Institute of Petroleum).”
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