Hello, I’m driving a Volvo S80, 2.9 liters, 200 hp, 6 zly. Bj, 10/98. Now I have the following problem: My on-board computer always displays the following messages: Brakes – Stop immediately, emissions – Stop safely – Start again. Maintenance – ABS required, maintenance STC required. The tacho fails and the car then drives only 40 km/h. Then I have to stop, restart and the problem is solved for a few minutes. I have the feeling that the problem occurs more frequently in warm weather than in cold weather. The Volvo dealer has read out the PC, cleaned the throttle unit and installed new software for it. However, the workshop computer shows: internal error throttle unit. Now I should buy a new unit. But what I don’t understand is the following: If the o.g. messages of my on-board computer are displayed, I can’t insert the 5th gear anymore, the return lights don’t go up and since yesterday the windows don’t go up automatically. This can’t all be related to the DK unit?