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

SL/R230: Question about PSE pump function.

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Old Aug 9, 2020 | 01:29 PM
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Dirtleg13's Avatar
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From: Cloverdale VA
2003 SL500
Question about PSE pump function.

So just fixed the trunk release air leaking problem. Sprayed it with soapy water to test and cycled it about 8 times. Seems to not be leaking as far as I can tell.

My question is how often is the pump supposed to cycle after actuating the trunk? It seems to cycle 4 or 5 times each time the trunk latch is actauted or a door opened.

It never times out, just turns on and off a number of times.

Thinking I may have another leak somewhere in the lock/seat mechanisms but wanted to know how a properly functioning system was supposed to act before chasing a potential non issue. It's had the trunk issue since I got it so I'm unfamiliar with the correct operation of things.

Thanks.
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