I'm trying to tackle some electrical gremlins in my 87 300e, particularly right rear window console and door switches inoperable (even though regulator/motor assembly, switches & fuse tested good), childproof rear window console switch inoperable, weak/dim trunk light, no rear dome light and no rear window defroster. The Haynes Manual schematics show the grounds, some of which are shared, and labels them as E-1, E-2, etc. Does anyone know where each numbered gound is located, or have any suggestions as to how to get this information? Thanks.

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87 300e (white/black; amg body kit)
88 300ce (red/cream; amg body kit)
93 300ce cabrio (white/blue/blue top)
93 300ce cabrio (black/grey/black top)
98 ml 320 (totaled @ 137,000 miles)
99 clk320 (black/grey/black top)