The ABS ,BAS& ASR lights keep coming up

Question edited for a lot more clarity.
Question moved to model category.

Did you have the radio or CD on when you were doing all this work? Low battery voltage can cause it along with other reasons.

https://www.google.com/search?q=1999+E320+BAS+ASR+light+on

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Well, it could mean that the emergency brake has not been fully released.The ABS system light is on if something has occurred within the ABS system. Something faulty may have happened there, get it checked out!

If you fixed let me know I have the same problem on my slk 99. For your information a MB guru told me that is the ETS/ASR CONTROL MODULE that is attach to the ABS hydraulic unit
no 0205459632. It is very expensive I ordered. I will post results in two weeks.

you most likely have a wheel speed sensor not transmitting signal. need to have abs codes scanned. the asr light is related to the abs light same problem causing both to come on

You have to get the coeds cleared by a garage .

Replace the brakeswitch. Be sure to use factory parts, they are very sensitive and aftermarkets may not work.

Had same problem.
At the same time the cruise control aint working either ?
My solution, (how my problem was fixed was to change the
switch behind the break pedal, ie the switch which regulates yr
rear stoplights. In my case this switch was worn out and malfunctioned.
This is a 2min job, and part aint expensive.

You should get the code red by a dealer, if not and you have just changed the pads, then some time the code needs clearing, this merc can do for you or a good garage that has a DC. If not i may know man that can, let me know your area.

need to replace brake switch intermittent problem with them ....for lights bas, abs,asr,to go off..

ok, first you have to clear the codes.
in this type of cars you cannot clear codes with a regular obd II it has to be the factory scanner or similar. after you clear the codes drive it for a while. when light comes back on scan it again and that is going to be your true problem. if you replaced the switch but didn't clear the code the light will be still on because the computer doesn't know that you fixed the problem. so try it out and let me know if worked.