Hey all. 1981 300SD, wondering who's installed keyless entry on one, and how you went about it. I've done some searching, but not having alot of luck....Thanks!!
Calvin

I plan on doing the same. I have a Ford keyless door module and a couple of key fobs. But first I have to rebuild the engine and restore the interior.

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Michael LaFleur

'05 E320 CDI - 86,000 miles
'86 300SDL - 360,000 miles
'85 300SD - 150,000 miles (sold)
'89 190D - 120,000 miles (sold)
'85 300SD - 317,000 miles (sold)
'98 ML320 - 270,000 miles (sold)
'75 300D - 170,000 miles (sold)
'83 Harley Davidson FLTC (Broken again) :-(
'61 Plymouth Valiant - 60k mikes
2004 Papillon (Oliver)
2005 Tzitzu (Griffon)
2009 Welsh Corgi (Buba)

I think I've solved it on my own, and I'm certainly not paying someone 25 bucks for directions. Thanks!

You need a RKE system that will send a lock/unlock signal for 2-3 seconds. The typical half-second pulse usually isn't enough to trigger the central locking pump. You'll also need a diagram of how to hook up two 85/85a relays to convert the typical lock/unlock signal into a signal the MB central locking pump will understand. Crutchfield used to sell a harness with sockets for 2 Bosch relays. I think they sold out. Of course if you go the auxiliary solenoid route, you won't have this problem.

Sixto
95 S420
87 300SDL

http://www.drdetailshop.com/476A.htm

The W124 already had this installed.
The lock and unlock icons work perfectly.
I hope nothing is connected to the "aux" or "alarm" icons because they do not work.
(I fantasize about remote start... one for glow plugs... the second for START)
[slackard wants cool interior upon entering] Then there's the issue of auto-
matic shutdown @ lower oil pressure , always an issue for unattended idle.
OR Steve's correct lectures about the inability of alternators to maintain
all systems @ idle with Fan(s) and A.C. on.[Balmar on the West Coast makes
some incredible alternator/generators for marine use...isolated ground]. Can
you have too powerful an alternator?

My w123 has keyless entry, and a remote starter. The former has an option for the long lock/unlock signal, and am using a 126 vacuum pump. The later has a delay for glow plug cycling. Work's like a charm. Design Tech brand.

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One more Radar Lover gone...
1982 VW Caddy diesel 406K 1.9L AAZ
1994 E320 195K

Here is a good one can a remote start be put on an SDL? Their so nice in the winter, it wouldn't take much of a computer to cycle the glow plugs and than crank.

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1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200

Many aftermarket remote start units actually have a glowplug delay function built in. Makes it a piece of cake to install, and probably nice to have for cold NE winters...