Always a problem to buy sight unseen, no matter the item.
As far as the "dealers", I do not trust the salespeople one bit.
The car needs to be checked by a GOOD indie shop...ask around
Then again different people have varying interpretations of condition.
I would definitely ask if some one n the M/B could eyeball it

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BMWCCA # 12660
14 GLK 350 M/B (hatefull POS gone)
05 CLK 500 AMG Cabrio
07 530xiT
09 Boxster