How can i delete all of the previous searches on Google? Do they slow down the computer?

They don't slow down the computer. If you're talking about the cached search in the drop down, just highlight the ones you want to delete and hit the delete key.

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99 ML320
94 SL600
92 SL500
95 E320 Cabriolet
87 560SEC
86 300SDL Grease Car
80 380SLC Euro

13 Fiat Abarth
02 Maserati Spyder Cambiocorsa
00 BMW Z3
90 Rolls Royce Silver Spur
80 Ferrari 308 GTSI
88 Jaguar XJS12 H&E Edition
99 Land Rover Discovery

Hey 420, do you have that program called CCleaner? Good program to run once a week or so, it removes 3 or 4 gigabytes of junk every time i run it. Also has a good built in registry junk remover.

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1985 CA 300D Turbo , 213K mi

You must be browsing every ad-heavy flash infested website on the net! Ouch!

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1984 300TD

All you need to do is to clear your private data in your browser. In Mozilla it's in the Tools menu. That won't speed up your computer, but it will hide what you searched for, at least on your own computer.

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2004 VW Jetta TDI (manual)

Past MB's: '96 E300D, '83 240D, '82 300D, '87 300D, '87 420SEL

Thanks guys for the info.