Words fail me (almost).
If the shop tuned the car, that would have included setting the mixture both with a tri-gas meter, and then checking the lambda operation, both of which would have detected lean operation.
Also, when the plugs were changed, they would have shown signs of lean running.
Performance would have suffered as well, and a common condition known as "lean misfire" would occur at idle.
Did you or Mr. Hunt Valley note any of these conditions?
So now Mr Hunt Valley is in effect saying that he either tuned the car to run lean or tuned the car incompetently.
And the assertion that the new chain triggered or somehow uncovered the problem is complete and unadulterated BS. What caused the problem is that they installed it wrong. There is no other way a well-running engine could suddenly turn into a pile of parts.
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe