Hi. I want to install a remote start unit with the remote locking feature into my 92 400E. I want to know if anyone has done this successfully, particularly the locks part. My local installer said that I cant use remote locks because I have the plunger type. But I think that is a crock because you can just tap into one of the three wires going to any of the lock cylinders, correct?

Any advice is greatly appreciated.

Thanks.

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93 300D 2.5 Turbo, Black/Palomino 273K
09 E350 Black/Black 41K

But I don't think it is easily possible to do what you are attempting.

The locks on your car are pneumatically controlled, not electrically. Locking or unlocking the door by the locking pin lock the immediate door and simply activates the vacuum system to actuate the other locks.

You would most likely have to connect the remote locking receiver to the vacuum pump under the right rear passenger bench.

One more thing, remote locking will NOT arm or disarm the factory alarm on cars of your vintage. The alarm is controlled by microswitches built into the tumblers of the two front doors and the trunk lock. These switches are not electrically operated, they are PHYSICALLY operated when you lock/unlock the door.

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'94 W124.036 249/040 leder; 8.25x17 EvoIIs
'93 W124.036 199/040 leder; 8.25x17 EvoIIs, up in flames...LITERALLY!
'93 W124.036 481/040 leder; euro delivery; 8.25x17 EvoIIs
'88 R107.048 441/409 leder; Euro lights
'87 W201.034 199/040 leder; Euro lights; EvoII brakes; 8x16 EvoIs - soon: 500E rear brakes
'70 R113.044 050/526; factory alloys; Euro lights

I installed 2way remote start/alarm with pager. I disconnected OEM alarm and used existing wiring. Here is diagram where to splice: EASY to install keyless entry in W124/W126 It's looks very similar to the one I found somewhere online.
As for remote start I found diagram somewhere online. Ran wires to ignition switch and it work no problem.
Installation is not very complicated since you have all wires from doors,hood,trunk,lights to flash.
Good luck

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1999 ML430 Silver 135k ml
Smoked LED taillights, Alpine in-dash DVD player, 12" sub, Pioneer components, 2 amps, 4200k HIDs, ML55 headlights, 20" rims, mirror LED blinkers

SOLD. 1996 E320 145k ml. Burgundy

SOLD but miss it everyday 1992 500sel Black
Chime buzzer mod,Alpine CD/MP3 player with stock amp,Euro headlights,S600 grill,20" rims, BEST CAR EVER!

SOLD. 1990 300E White
187k ml,smoked tails,Euro headlights,17rims,Intake,12" sub in first aid kit,alarm/autostart,buzzer mod

Thanks for all the replys guys! I knew it could be done, i dont trust anyone touching my car but me. I will search around for a unit and then install it. Anyone have the diagram for the remote start wires? I installed one in my old 420SEL years ago, without a manual, and managed to successfully do it. But it sure would be easy to know what wires to tap into.

thanks!

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93 300D 2.5 Turbo, Black/Palomino 273K
09 E350 Black/Black 41K