I performed the check of the lambda as per
benzmac instructions.(lambda you can check)
my readings were as follows.25 low 31 high
avg of 28.
Should I start with an adjustment of the lambda or change the o2 sensor and check again? this car has 103000 on it and I dont know if the o2 sens was ever been changed.
Also what size of wrench is needed for the o2 sens? I only go to 19mm at this time.
92 300TE 4MATIC