JamesMitchell

Hello. I've got a (new to me) '07 S65 with 106K miles. One owner car serviced exclusively at MB during its life. Several ABC flushes are listed in the Vehicle Master Inquiry (VMI), but the only component I've seen replaced was a leaking high pressure line in the front last year. Reading various threads, with the high pressure line failing and due to age/miles, it's time to replace the accumulators and pulsation damper. So I've just ordered the front and rear accumulators and the pulsation damper as well as the AGA tool to do the ABC fluid flush and filter. Here are the parts I ordered through FCP Euro:

Front accumulator: p/n 2213270215
Rear accumulator: p/n 2213280015
Pulsation damper: p/n 000466040080
AGA ABC flush tool: AGA 229997119

Question: for folks who have done this, when accessing the rear accumulator, did you end up replacing the rear exhaust clamp? Also, given the car has had multiple ABC flushes over the years, would you recommend doing the valve blocks - or would that be overkill? Thanks in advance. I'll report back after the parts come in and I replace everything.

GrepAwk

Not sure if they are the same layouts but...

I did not have to drop the exhaust to get to the rear accumulator. Just removed plastic belly pans.

its good that you are doing all of them as PM. My experience was a sagging wheel so I also did the valve blocks to make sure they were clean and to check the solenoids for their o-rings conditions.

DRTYLNDY

Yesterday I tried to replace the pulsation damper on my 07 S65 and I had no luck. I could not get the old part lose so I had to put all back together unchanged.
Let me know if you have better luck!
Johan

JamesMitchell

Johan,

My parts will be coming later this week. I've attached the WIS of the Pulsation Damper removal. MB calls for the entire tandem pump to be removed, then put in a vise to twist the damper off - upside down so dirt/debris doesn't get into the pump. I won't be removing the pump (haha). The socket for the bolt on top is a 17mm. The torque value of the pulsation damper to tandem pump is 45Nm (33.2Ft-lbs). So it's on there pretty tight. Once all the parts arrive and I get the car lifted, I'll start and report back here.

DRTYLNDY

The new damper has the nut on top but the old one in my car does not and that was my problem. I even tried modifying a oil filter removal tool to get at it... No luck for me.

JohnLane

I did the pulsation dampener in mine early on.... Pull the plastic underneath and place a drip pan... Couple cans of flammable brake cleaner to wash any and all ick away...
33lb/ft is not tight... Though it takes more to get it to crack loose. Once loose it spun out. New part spun in. Done.
Mine had the hex on top so much easier to get out then early models.

UNderdog

When I did my pulsation damper I used compressed air to clean the area and simply removed and replaced. It wasn't dirty anyways I was just very careful. No drama - was easy. No way anybody pulls the pump to replace. On the V12 it's easy to get to. Rear Accumulator came off easily IIRC - didn't have to move anything. Front accumulator will require a thin end wrench because a normal one won't fit between the accumulator ball and the valve block it's mounted to unless they've changed the design. Pulsation damper has a hex head on the top for a socket. Accumulators don't so need an end wrench. Edited to add: This is on an '08 S65.

07CL550Benz

I've been wondering about the process of replacing the 2 accumulators, is it as easy as unscrewing them and just screwing the new ones in? Do you need to do rodeo afterwards? Is there literally anything else to it?

UNderdog

I simply unscrewed and replaced. System is not under pressure so nothing comes out. Maybe just a little dribble. I did not rodeo afterwards. They do degrade over time so should be considered a wear item.

V12mrinc

Hello, did you end up taking it somewhere for removal. I literally broke a ratchet adapter and finally the 17mm fitting on the dampener itself just broke on me… hope to hear from you. Thanks

JohnLane

Loosening by turning counter clockwise? I have got to replace the pulsation damper twice in my '08 S-65. Second time did it in the parking lot at MB. Five minutes start to finish. More time spent with the spray being sure things around the base of it are clean then replacement.