Bob,
I checked the epc and it seems my 98 W210 doesn't use that 0025427219(64) relay. It uses A0025421319 for the K-40 relay (Right Rear engine comp) and for the fuel pump (under back seat). I thing epc said there were 3 - not sure where the other one is.

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Graham
85 300D,72 350SL, 98 E320, Outback 2.5