I bought a set of glowplugs for my former '84 300SD at the dealer a couple of years ago, and they handed me Bosch glowplugs in a Bosch box. They billed me for genuine MB glowplugs, when I questioned the authenticity of the parts, I got a blank look and a comment that MB sells them that way now.

Right, even though the Bosch box had no MB part number only the generic Bosch number, they must think people are stupid.

My last straw with them was when they refused to let me have a copy of the service records for the ML320 I purchased new at the same dealership and they were the only one's to touch it until it went out of warranty. The service writer claimed that the records were not my property, and that I wasn't allowed to look at them.