Eep 2 bmw compact the only thing that works on on my dash is the speedo and even that is wrong

Most likely the cluster has failed

most likely speed sensor. the fronts are the same, and the back 2 are the same. but the fronts are not the same as the back. I believe it's the right front for the above problem.

I fix a lot of clusters. Most of the time it is just a bad connection at the plug. Since you 3 unrelated things, I would guess at this is your problem. Moist bezels around the dash just pop off. You'll have to remove the kick panel under the steering wheel fist, it has screws on the bottom. Just look at the bezels and see if you find any screws

Check a couple things:

1. Verify that the dimmer switch for the dash lights isn't in the full dim position (it turns off the dash lights).

2. Check your fuse panel (in the engine compartment) for a blown fuse.

As a first solution not being a BMW expert, sorry...try checking the fuse panel as in some cars, the instrument cluster is run via one or 2 fuses.

Hope this helps ,
Darren.

it may be possible that your heater core was faulty and some has by passed it. open hood and check for incoming and outgoing heater hoses into firewall(dash of car). it is also possible that the heater core is plugged, try getting your cooling system flushed

If is for a 3 series compact (318ti most common) then
P2799 is the intake air tem sensor 2
Which would explain the high idleing. Probably a sensor problem (bmw will charge) a competant mechanic should do it easily.

Probably the alternator but I'd check it to be sure first. Many auto parts stores will check you whole charging system for free so call around.

thanks.

if the engine is running fine and no limp mode no engine lights. abs is working then the only other thing could be the dash may need replacing as putting the battery on wrong can blow the electronics in the dash as they are both linked. i ask is there any other problems as the rev counter work to ecu in line with speedo and the abs unit to determine timing etc. speedo works of the abs system the connection between them both is the board in the dash board. you can replace the boards in the dash but you will need replacement dash parts to do this but remember if you change the dash you need to log the miles as new dash will have different miles and uk mot log your miles to dvla. USA i dont know you would need to look into this.

it. All kinds of repair manuals or any help you could get from them. They are available 24*7 through live chat 1999 2003 BMW 3 Series E46 Service Manual