SL-Class (R230) 2003 -- 2012: Discussion on the SL500, SL550, SL600

SL/R230: 2003 SL500 Rear ABC Hose Part Number

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Old 07-03-2021, 06:53 PM
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2003 SL500 Rear ABC Hose Part Number

I need help identifying a pressure hose attached to port "P" on the rear valve block. It is the hose 2nd from the left in the attached picture which attached to the top port on the valve block. There is a rupture in the rubber hose portion. I am able to disconnect the rubber hose from the metal elbow which is connected to the valve block but haven't a clue where the other end leads to? I'm
Not finding a part number stamped on the hose?

Old 07-04-2021, 08:59 AM
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I believe that is 2309970452. It would not include the tube that actually attaches to the valve block. It is the pressure line from the tee under the drivers floorboard back to the quick connect at the rear valve block. Not a bad line to put in, but one of the first to fail.
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Old 07-04-2021, 10:36 AM
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I just replaced that line two days ago. Price was $99 from a place in Minnesota. Took exactly 2 liters of oil to replace what was lost when the line ruptured.

MikeJ65, what other lines can I expect to replace soon? Maybe I should replace some or all preemptively? As things are now, I wouldn't take this car on a long trip for fear of being stranded with a broken hose.
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Old 07-04-2021, 03:18 PM
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Originally Posted by MikeJ65
I believe that is 2309970452. It would not include the tube that actually attaches to the valve block. It is the pressure line from the tee under the drivers floorboard back to the quick connect at the rear valve block. Not a bad line to put in, but one of the first to fail.
Thank so much! Part confirmed via diagram and ordered. You've been heaps of help and it's much appreciated!
Old 07-04-2021, 03:24 PM
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Originally Posted by RScott
I just replaced that line two days ago. Price was $99 from a place in Minnesota. Took exactly 2 liters of oil to replace what was lost when the line ruptured.
.
Did you run into anything unusual with the installation? It looks pretty straightforward. If I'm seeing things correctly,. The process should be:

1) Disconnect quick connect at valve block tube.

2) unscrew rubber isolator with 3 hard lines Running through it.

3) Disconnect hardline from T-Connector.
Old 07-05-2021, 07:35 AM
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It is straightforward. I reinstalled the new line by making the connection at the T-Connector first, and I think that made it easier.
Old 07-05-2021, 08:14 AM
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RScott,

After the rear pressure line, it gets a bit more complicated as to which lines to replace proactively. The front pressure line is also failure prone, but it is way more difficult to install.. This line is the one with the tee piece attached. You might look at the posts where people replace the hose portion and reattach to the tube with a compression fitting. While the compression fitting is not as good as a new solid tube, it does allow you to get back on the road quickly. You also have pressure lines from the pump to the pressure valve and the valve to the tee. The strut lines can fail, but in my opinion, they are not high enough risk to do preemptively.

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