I need to know a good, low-priced source for BOSCH tuneup parts. Has anyone bought these on e-bay and had problems? Just want to make sure that the parts are genuine Bosch OEM and not cheap aftermarket...have heard some horror stories. Any referals and/or reputable sellers would be appreciated, since I guess this is probably cheapest source for these???? Many thanks,

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JEFF & JO and our 3 Golden retrievers:
SUNNY, CHEYENNE, and POCO (the little Chupacabra)

'84 380SL (mine) 222K, still strong but showing its age
'91 300CE (hers) 135K, near mint in and out
'83 380SL (mostly mine) 150K, mint in & out