Date registered: Jan 2012
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Hello everyone I am new here and have a question
I haven't owned a Mercedes for nearly 10 years but am about to buy a one owner 1990 420SEL with 131,000 miles on it, it has a very clean carfax/autocheck and seems to be very well taken care of, my question is what symptoms of potential problems should I keep an eye and ear out for on this particular model? Also I live in the Phoenix area and so can I use castrol 20W50 high milage for my oil year round, and is it OK to add lucas upperclynder lubricant oil additive every other (or every) oil change? Thanks in advance for any replies!