e-clips have been known to come off, with catastrophic results. Swage the link on, it's the only safe way. If you aren't comfortable doing this, have a mechanic change the chain for you.

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!