Clicking means that its not your ignition switch which is good.

Clicking and nothing else means the starter isn't getting sufficient power to turn.

That could mean one of two things, battery is weak or starter is worn out requiring too much power to turn.

I'd charge the battery overnight just to make sure. If it doesn't start but does click with a fully charged battery, then it's the starter.


Thayer

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77' 300D, "Cartman" SOLD @ 150K (didn't know what I had)
83' 300SD, "The Superdon" 325k+ @ 28mpg
95 E320 wagon, "Millennium Falcon" 231k+ @ 24 Mpg
95 E300D, "Sherley" 308k @ 33.69 Mpg, currently anticipating a head
99 Suzuki Intruder "Trudy" @ 45 mpg