Keyless entry...
http://cgi.ebay.com/ebaymotors/KEYLE...Q5fAccessories
http://cgi.ebay.com/ebaymotors/KEYLE...Q5fAccessories
http://www.2phast.com/500e/

https://mbworld.org/forums/e-class-w...ess-entry.html
http://cgi.ebay.com/ebaymotors/X2-FL...1%7C240%3A1318
http://cgi.ebay.com/ebaymotors/X2-FL...1%7C240%3A1318
Is that MaxPlus one plug and play for all w124's?

http://mbkeylessentry.com/1.html it is possible to have the lights flash w/ activation...
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As for the sunroof/window deal, that feature is controlled by the convience module, so if you were to locate which wire(s) get energized by holding the key, then you should be able to hook an aux button to this. I don't remember if these systems have a unused aux output or not.
http://mbkeylessentry.com/1.html it is possible to have the lights flash w/ activation...



