I know of a certain cheap german brand's franchise dealer which solves the problem of repeated customer visits for check engine lights by removing the bulb. Now recently one of my W210's mysteriously came back after a visit with a dead check engine bulb. I wonder if it was the same malicious incompetence as at the people's car dealer? (with the added twist of covering their tracks by actually replacing a live bulb with a dead one)

Has anyone ever heard of this, or any mechanics ever known this to go on at the dealer's shop?

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currently enjoying,
'96 E300 black opal 149K
'97 E300 smoke silver 137K
also owned by family members,
'83 240D manual
'97 E300 white
'02 Jetta TDI