Date registered: Nov 2014
Vehicle: 2000 E 320 Wagon + 2002 ML 500 SUV
Location: Pineywoods Region of East Texas
Mentioned: 1 Post(s)
Quoted: 126 Post(s)
He may not still be here. Post is almost 2 years old - the prior ones date from 2010 & 2007 - !
While its not fruitless to 'resurrect' old threads, but OP (iriginal poster) may have moved on.
But, good news is we also have been thru this routine !
If you search "w163 power steering bleed procedure" here or in Google (add Benzworld name) you'll find the thread or posts that have the exact .pdf attached.
Most all of what is said here mirrors my experience - use only Euro PS Fluid. Prestone makes a Euro fluid that is correct also Pentosin makes one or hit an MB dealer.
PS Filter is integral to Reservoir so if old & clogged get a new reservoir (u could backflush but its not cost effective) they're only $60 at Dealer I got a nice one for $18 thru Amazon.
O-ring seal where the Reservoir connects to pump port can leak & badly. Mine had a fine seal but plastic reservoir had cracked around seal port circumference, causing seal leak.
Solution was New reservoir, re-use existing seal, new Prestone Euro fluid (1-2 pints) and Viola, perfect quiet steering & no leaks.
I was prepared to do the MB Workshop bleed routine but didn't need to as no air was ingested into my pump or rack - if you catch a PS leak early enough & leave engine off while switching out leaky seal and / or reservoir, you can skip bleed procedure its mainly for those cases where air has gotten deeper into system.
Make sense ?
Hope this helps - David in East Texas
Gone, and fondly remembered:
1975 240D - 4 speed manual, power nothing
1984 190E 2.3 - Cute, reliable & slow
1983 300SD - Great highway tourer, 28mpg
Here & greatly appreciated:
2000 E 320 Wagon -
2002 ML 500 - Finally got one !