Basicly you can unclip the plastic part & just replace it. It is avail as spare part. With the front cover removed it will clear as long as the chain is completely removed!

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MERCEDES BENZ MASTER GUILD TECHNICIAN
ASE MASTER TECHNICIAN
27 YEARS DEALER M.B. Shopforeman
190E 2.3 ITS RACECAR
1986 190E 16V