IMHO, this is the best one they make. Have a professional do a PPI. Parts, repairs and gas consumption will be high compared with say an E320. Insurance will also be higher. Check with your ins. co.

Assuming it is in good condition and you can afford repairs and maintenance, it will last as long as you want and the driving experience will be unmatched.

BTW, I think most would opt for the S500 or S320 as a more budget friendly choice. But, as they say, you only go around once. Good luck.