I finally registered for the EPC, that should comprehensively clarify any future purchases. I didn't know you can search a part number and it would give the chassis/model compatibility. Thanks!

This EZL "looked" right because it has 4 plug connections (plus the vacuum) while most standard 300E have 3 connections.

So I've learned:

• Use the EPC to confirm applications for used EZL's
• Same year SL EZL's apparently do work for CE
• Check for 8 pin on the two large plugs
• Use the thermal paste and maintain the ignition system

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'88 300TE, 175k, black RENNTech 3.6L Recaro C's AMG 1 SOLD
'92 500E, 110k, Spruce green, stock SOLD
'94 E320 Cabriolet, 130k, E500 wheels, Emerald green SOLD
'94 E320 Cabriolet, 110k, black, stock, SOLD
'88 300TE, 229k, dark grey, SOLD
'90 300CE, 212k, white, new paint, SOLD
'91 300E, 209k, white, rebuilt head SOLD
'74 914-6, grey, 2.7L 325hp twin turbo Audi conversion