Diesels take A LOT of energy to start, their starters are much more heavy duty than a gas car due to compression of the diesel engine.

If you suspect the battery is low/bad, start there. Take the battery to a place that can load test it. You have to have a battery that will crank it up to get enough compression to fire-off the fuel.

Keep us posted,

Haasman

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'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)