w215 Quaife (QDF29B) LSD new production run @ 5 units of demand
Junior Member
Joined: Jan 2018
Posts: 29
Likes: 2
R129 SL600, R230 SL55. C215 CL65
Thread Starter
Member
Joined: May 2020
Posts: 247
Likes: 57
From: Fort Worth
2005 CL55 AMG || 2005 CL65 AMG || 1989 560SEC
Tariff update:
Might only be 12.5% per Birds Garage!
Nice.
We're getting close....
Also, I've used Motul Gear 300 75w-90 for the Quaife unit I've had in my CL55 for a few years. Be very sure to use hypoid gear oil, as non-hypoid additives cause issues with gear-driven limited slip differentials. IIRC, I removed one Axle shaft, which allowed me to remove the assembly for Quaife fitment. When you reinstall the drive shaft, MAKE SURE TO LOCTITE THE BOLTS HOLDING IT ON! Mine kept loosening till I did that.
Might only be 12.5% per Birds Garage!
Nice.
We're getting close....
Also, I've used Motul Gear 300 75w-90 for the Quaife unit I've had in my CL55 for a few years. Be very sure to use hypoid gear oil, as non-hypoid additives cause issues with gear-driven limited slip differentials. IIRC, I removed one Axle shaft, which allowed me to remove the assembly for Quaife fitment. When you reinstall the drive shaft, MAKE SURE TO LOCTITE THE BOLTS HOLDING IT ON! Mine kept loosening till I did that.
Last edited by JustTXn; Jul 22, 2025 at 01:26 AM.
Junior Member
Joined: Jan 2018
Posts: 29
Likes: 2
R129 SL600, R230 SL55. C215 CL65
Tariff update:
Might only be 12.5% per Birds Garage!
Nice.
We're getting close....
Also, I've used Motul Gear 300 75w-90 for the Quaife unit I've had in my CL55 for a few years. Be very sure to use hypoid gear oil, as non-hypoid additives cause issues with gear-driven limited slip differentials. IIRC, I removed one Axle shaft, which allowed me to remove the assembly for Quaife fitment. When you reinstall the drive shaft, MAKE SURE TO LOCTITE THE BOLTS HOLDING IT ON! Mine kept loosening till I did that.
Might only be 12.5% per Birds Garage!
Nice.
We're getting close....
Also, I've used Motul Gear 300 75w-90 for the Quaife unit I've had in my CL55 for a few years. Be very sure to use hypoid gear oil, as non-hypoid additives cause issues with gear-driven limited slip differentials. IIRC, I removed one Axle shaft, which allowed me to remove the assembly for Quaife fitment. When you reinstall the drive shaft, MAKE SURE TO LOCTITE THE BOLTS HOLDING IT ON! Mine kept loosening till I did that.
hope we don’t have much of a tariff if any at all America just signed a trade deal with the EU… both sides seem happy…
Junior Member
Joined: Jan 2018
Posts: 29
Likes: 2
R129 SL600, R230 SL55. C215 CL65
Junior Member
Joined: Jan 2018
Posts: 29
Likes: 2
R129 SL600, R230 SL55. C215 CL65
yes I received a text from DHL telling what my import duty was as well as when it would be delivered… import duty needs to be paid before they will deliver…
Thread Starter
Member
Joined: May 2020
Posts: 247
Likes: 57
From: Fort Worth
2005 CL55 AMG || 2005 CL65 AMG || 1989 560SEC
I wouldn't worry about yours not shipping yet, seems like they're pretty busy. Maybe they bulk ship different shipments to different regions on specific dates?
Also BZ,
not sure! He asked me what my import cost was, and mentioned he was trying different options to achieve different import prices. I'm not bothered by it, this unit plus import was still cheaper than the one I bought a few years ago, lol. Impressive given inflation over the time period.
Also BZ,
not sure! He asked me what my import cost was, and mentioned he was trying different options to achieve different import prices. I'm not bothered by it, this unit plus import was still cheaper than the one I bought a few years ago, lol. Impressive given inflation over the time period.
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MBWorld Fanatic!
Joined: Jan 2011
Posts: 1,181
Likes: 59
CL65
So for those of you that have installed them in your 215, what's your overall impression? I've had one for a number of years, and love it.
https://mbworld.org/forums/cl55-amg-...-lsd-305s.html
Did Birds make a few extras for stock or did anyone back out? I'd consider having a backup for the future.
https://mbworld.org/forums/cl55-amg-...-lsd-305s.html
Did Birds make a few extras for stock or did anyone back out? I'd consider having a backup for the future.
Newbie
Joined: Jan 2025
Posts: 12
Likes: 0
So for those of you that have installed them in your 215, what's your overall impression? I've had one for a number of years, and love it.
https://mbworld.org/forums/cl55-amg-...-lsd-305s.html
Did Birds make a few extras for stock or did anyone back out? I'd consider having a backup for the future.
https://mbworld.org/forums/cl55-amg-...-lsd-305s.html
Did Birds make a few extras for stock or did anyone back out? I'd consider having a backup for the future.
My unit still waits on garage floor for install. I must wait that they stop salting the roads before drive season.
DId you use shaft mod kits to your unit? I just cant understand what is the purpose of the circlips. Are they somekind of back up if the bolts gets loose?
Thread Starter
Member
Joined: May 2020
Posts: 247
Likes: 57
From: Fort Worth
2005 CL55 AMG || 2005 CL65 AMG || 1989 560SEC
on my CL55 (not yet installed this new one on my CL65), I didn't use any circlips or additional kit pieces aside from either a new bearing or bearing race on either one or both sides. It was very simple. One wheelshaft came off from the differential, wheelshaft attachment point/hub came out, slid the differential assembly to the left with the additional space and removed assembly. Removed ring gear, attached it to new quaife diff (most difficult part IMO, had to find a way to hold everything still to torque ring gear attachment bolts on), put either a new bearing center or race in (I forget which, one is easy to remove), then reverse the removal procedure. No runout (or whatever it's called) adjustment needed, checked the ring gear mesh point and it was centered exactly.
Last edited by JustTXn; Jan 28, 2026 at 12:26 PM.
