What brand/weight differential fluid/gear oil are you using?
I'm thinking it's about time to change out my differential fluid, I currently have 81k on my 2007 E63.
Was thinking of using Motul Gear300 Synthetic 75W90, would this be comparable to MB 85W90?
Any other recommendations? Did you have to replace the bolts and washers?
Thank you in advance!


Castrol Syntrax 75w140 limited slip.
Replace crush washer if used, no need to replace bolt.

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Mercedes-Benz Differential Oil (Hypoid Oil) - SAE 75W-140 (MBZ Approval: 235.61) - (1 Liter) - Motul Gear Competition 105779
This fits your 2006 Mercedes-Benz CLS55 AMG Base Sedan
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