The 96 E320 is like my 97 and doesn't have an idle control valve - it is all electronic. Please see my parallel thread, chasing down a similar issue: http://www.peachparts.com/shopforum/showthread.php?t=191793

I bought a can of MAF cleaner at lunch and am going to give it a try before dropping $300 on a new MAF.

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08 W251 R350
97 W210 E320
91 W124 300E
86 W126 560SEL
85 W126 380SE Silver
85 W126 380SE Cranberry
79 W123 250
78 W123 280E
75 W114 280