Date registered: Jan 2006
Vehicle: 73 280SE 4.5, 71 300SEL, 03 BMW Z4, 72 Fiat 850, 80 Triumph TR7, 85 Porsche 911
Location: DC Area
Mentioned: 1 Post(s)
Quoted: 95 Post(s)
I say go for a 108, the SEL version. If you go for a 109, you'll need to worry about air suspension, and they cost a ton of $$ to fix when stuff starts going bad. The 280SEL is more or less the same car as the 300SEL, but with "traditional" suspension. I've got a 108 with FI, and when it runs right, the car is a dream. The fuel system can be finnicky to get set up correctly though.
I've also owned a 114 with a solex carb, and I hated the damned thing so much (the carb) that I replaced it with a weber. In retrospect though, I should have just rebuilt the solex and called it good.
If you decide to go for a 108, this forum has a lot of online resources to help with any tinkering you start in on.
Let us know which way you go!