Mercedes-Benz Sprinter Operating Instructions Manual page 271

Slide the pump lever for the jack into the
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sleeve on spare wheel carrier 4.
Raise spare wheel carrier
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lever and attach right-hand retaining hook 1.
Slightly raise the spare wheel carrier and
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attach left-hand retaining hook 1.
Pull the pump lever out of the sleeve.
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Tighten nuts 2.
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Put wing nuts 3 in place and tighten them.
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4 with the pump
Wheels and tires 269