Hi,i have not been on here for a while[i have been without a Mercedes]all that has changed now.I need a bit of help and info about buying a 1973 350sl.Really i need to know where to look for the weak points,the o/s/f wing is showing signs of bubbling near the head lamp,one of the rear arches is showing a tiny bubble.I will be travelling over 200 miles to view the car so i need as much info as poss.Thanks for looking,Les.