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Old 01-15-2002, 01:41 AM
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Join Date: Nov 2000
Posts: 107
Improved quality of replacement parts?

As an owner of a 1994 E420, I recently had the dis-pleasure of two costly repairs, namely, the wiring harness and throttle valve actuator. Considering that both of these items are fairly notorious repair items for this vehicle, and that the chief cause for both problems concerns excessive engine heat, I was just wondering if the factory replacement parts were re-designed to address the problem of engine heat. It would be a real shame if MB simply offered the exact same parts as originally installed, as that would result in the same predictable failure down the road.

Does anyone know whether these parts were re-designed to better handle the known engine compartment temperatures of the E420?

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Old 01-15-2002, 08:21 AM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
The wiring harness has been modified! The wiring on the the throttle actuator has also been modified. The actuator itself hasn't.
MERCEDES Benz Master Guild Technician (6 TIMES)
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Old 01-15-2002, 08:32 AM
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Join Date: Jul 2000
Location: Toronto, CANADA
Posts: 1,193
I had several repairs done on my 420SEl where I was told that parts had been modified and improved to correct certain problems and perform their functions better. I think MB is in the habbit of doing this.
Jason Priest
1999 E430
1995 E420 - retired
1986 420SEL - retired
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Old 01-15-2002, 10:03 AM
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Join Date: Nov 2000
Posts: 107
That's great to hear. Hopefully, these two issues will be behind me for quite some time. With all the money I have put into the car, I'm planning on shooting for 300K at least.

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