In my 9000CSE 2,3t I had the fourth exhaust system installed (180000km). 2.3 hours were charged for this. This was explained with difficult dismantling of the old system (using welding torches). I believe that I was not slower during my do it yourself times. What time would be acceptable? For the renovation of the brake system at the rear (slices and coverings) 2,4h were billed. I imported the car ’98 even from Denmark for 38000DM!!! net (very good equipment, unfortunately no leather). At 140000 I had it turned into a deer tuning (230hp) and now regret that this did not happen earlier. The consumption is pleasantly low despite speedy driving (by 9l), there is no oil consumption. However, I am disturbed by the consumption of brake discs and exhaust systems. As I appreciate advantages such as high performance with moderate consumption, very good space supply and front drive (I live in mountainous surroundings), I will try to keep it at least until the next exhaust.