I'm planning to change gear oil on my 2007 Sprinter, but can't seem to find the specified lubricant on the internet, ie., "Shell Spirax MB 90" or "MOPAR # 05136033AA" - as called for in my owners manual. Suppliers like Autozone can't get it either. I would go ahead and just use Spirax /80/90, but not sure if that's the correct stuff for a limited-slip differential. Any thoughts/recemmendations? Not wanting to ignore maintenance schedules, and if it's someting I can do myself, I'm all for it.
Jim
Jim