 Went from an '89 430 to a '99 420s in late September. Am  astonished by all the features and how beautifully this 10 year old car was built. Although I find the brake pedal a bit soft and it travels a little too far...was told by a mechanic that this is normal? Changed the almost worn back brake pads and the pedal now feels closer to normal. Will also bleed the line for trapped air bubbles. May put a little extra air in the tires to see if it improves cornering/handling. Undoing the negative lead on the battery will render the radio inoperable (anti theft feature) and you will have to get the "code" from Mercedes. Must read the owners manual to understand  how everything works.