It sounds like your starter solenoid is sticking on. If this happens a few times you may end up overspeeding your starter to the point of ruining a good core. Best bet is to replace with a genuine Bosch rebuilt.

These use a 10mm hex wrench to remove. Get a good quality allen socket and make sure the bolts are not full of road grime, the last thing you want to do is to strip the socket heads out.

These starters are attached with bolt heads facing the rear of the car, and you may need to go over the top of the tranny to get the top one. Take your time, or have a tech do it for 1 hr labor-- that's what mine charged me on my 300D Turbo.

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Nate Stanley
(Currently Benzless)
1985 F-250 6.9l 170K
2009 SCION XB 36.5K
2003 LS430 78K
2012 Kubota B 2320