Back to the 300TE owner who is having poor performance at elevations over 3500ft. We drive our '93 300TE 4Matic west every winter to ski. We have driven over MANY mountain passes at elevations approaching and over 10,000ft. The car does not have quite the same performance as lower elevations but it is still acceptable. We normally live at sea level so we would notice any big difference. Your problem has to be something other than lower oxygen content in the higher elevation air.
srharvey
'82 380 SL 160M
'83 240D 240M
'93 300TE 4Matic 260M