I am taking my 1986 300E in for service at 135,000 miles and the 300SL in at
45,000 miles. My mechanic says not to replace the fuel pump relay until it or the fuel pump goes bad since when the fuel pump goes bad you will need to replace the relay again. Any thoughts on how to get colder A/C on both? The SLs A/C only operates at one speed not matter which speed is pushed-any thoughts. Cruise control on SL is out-$1,000 plus labor? (its not a road car-just around LA-mostly in 1st or 2nd on the 405-usually skipping 4th on both-are there replacement gear ratios for 4th and 5th on both 300E and 300SL and where to get them and what would they cost? And why is the shift pattern on the 300E differerent for the shift pattern on the 300SL) Any suggestions for preventative maintenance on either or both?- posted
17 years ago