The engine is not grounded (except through the shifter linkage if both viton bushings are gone) without the strap.

Replace it, you need the connectors on both ends in good shape for the starter to work.

Peter

__________________
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!