I have a 99 SLK 230 and had plugs and wires replaced a few months ago and it was running greathowever it has been acting funny only at start up. When I first turn it over it starts right away but idles down and bogs out and shut off, I can restart it again and in most cases it will stay running or do it again, I get it almost always the third attempt but was just wondering what the fix could be for this? This only happens after setting for 8+ hours (like in the morning or after work) any ideas??