Hello,

With the help of my MB CD manuals, I am now tackling the job of my "non-working" 300SD locking system. I have a few questions that maybe someone could help me out with:

-The electrical connector (3 wires, I think they're blue yellow and brown) that goes into the lock vacuum pump in the trunk doesn't stay plugged in. Looking at the connector on the motor, it looks like one pin is "thinner" than the other two. Have the metal "sleeves" from the connector broken off and stuck onto these pins or should two of these pins look different? Also, the pump only runs if I hold the connector onto the motor (pushing hard!). Is a replacement connector available? Any ideas on how to fix this other than cutting off the connector and crimping on an insulated connector to each wire?

-Where are all of the "fittings" located? I found the 4-way tee under the passenger's rocker panel, but I understand there are two others. I'm most interested in the driver's side one (can't find it under the floormat anywhere).

-What to use as replacement vacuum hose? I'd prefer to get something locally -- should I use regular automotive vacuum hose (the black stuff) or get clear vinyl tubing from Home Depot?

Thanks!
Neal


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Neal Bhatt - bhatt@ic.net
'83 300SD 190k

All of the pins are the same on these. You might have a problem. Look in the connector to determine if some of the female ends are missing.

I would use the black vacuum hose found in an automotive parts depot. The tighter they fit, the better. Also, I have been known to use a little drip of Super Glue to adhere the connection.

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Benzmac:
Donnie Drummonds
1992 500E (very soon I hope :)
1981 280GE SWB
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM

Thanks Benzmac for your help..

It looks like the previous owner has messed with this system. Where is the "splitter" on the left side of the car? This would be the one with lines coming off of it to both left doors.

My clue that someone has previously screwed with the system is that there is no vacuum line anywhere to be found in the driver's door :<

Neal

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Neal Bhatt - bhatt@ic.net
'83 300SD 190k