[W126 Coupe] Distributer cap

[Gary]

go to sears and get the screw out tools   about 20 bucks

Joseph Schumann <capt_jschumann at yahoo.com> wrote:  You could try to solder an old screwdriver to each one and pull on it as you unscrew it. The soldering pencil may be less of  a heat risk.

GreyGarageRuss at aol.com wrote:      Thanks to Jonathan.Satish and others who responded to my query (below) on spark plugs for my SEC.  I finally found the time to try to install the W9DCO plugs along with new wires, cap and rotor.  I have the new plugs and wires in but my old distributer cap won't come off two of the three screws are damaged and won't turn.  I have been told that I should grind these screw heads off, remove the cap and use a torch to heat the area around the screws to try to loosen them!!  My question is: Is there any other method to remove these screws and if not, will the torch cause any other damage??  Thanks, Russell
  Date: Thu, 25 Oct 2007 00:36:06 EDT
From: GreyGarageRuss at aol.com
I recently called my local Benz dealer to ask if he had and Bosch W9DCO  plugs for my 1988 560 SEC and he said he did. When I went to pick them up he handed me WR9DC+ plugs. His computer screen indicated that W9DCO'S were Bosch #003-159-10-03, the same number on the box of WR9DC+ plugs. I didn't take them and when I got home, I checked one of the old plugs in my 560. It was a WR9DC+. Apparently the t shop that put in these plugs when I bought the car 3-4 years ago, used these resister ones.  My question now, is what is the difference....will anything be harmed...should I change them immediately or stick with this type? The car runs very well as is but I want to do the right thing while I am going to put new wires on. Thanks,  Russell  1988 560 SEC
Date: Thu, 25 Oct 2007 00:42:18 -0400
From: Jonathan <jhodgman at gmail.com>
Mercedes has specified in the past that the maximum level of resistance is not to exceed 5Kohms or damage to the ignition componentry could be damaged.
The resistor plugs on their own have 5Kohms resistance, couple that w/ the 1K in the wires, and the 1K in the cap etc and you are well beyond the specified maximum.
I would inspect your cap and rotor while doing your wires..chances are these plugs contributed to your wires demise.  I would remove the plugs and run replace it with the correct non resistor plugs.  Jonathan  Blue Ridge Mercedes

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