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I just joined Benz world, got great info on PSE problems for my 98 slk 230. Had all the crazy alarms going off and door switches going on. I took apart old PSE and found terminals rusted out. Replaced with brand new PSE from dealer for $550. Now it works great on fixing all of the original problems. But one thing, when I turn on igntion the horn makes a single beeb, everytime.
any guess why ?:eek:
 

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You have to version code the PSE module. The settings in the module have to be changed in order to have it work properly. The new module that you installed came from the factory with settings programmed in it that are different than what your old PSE module contained. You have to find someone with an SDS to do that for you.
 
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