i bought a 300sl and the 1st prob is i took off the hard top and now there is a red switch beeping everytime i start to drive ... next thing is after it sits for a few hrs it takes a couple times cranking it to start then after it does it idles rough for about 2 mins ... then when i hit the gas it dosent feel like theres power til i slam the gas ... i only have 50,000 miles on it ... idk any help would be great thanks