My dad has a 94 E420. It ran fine until he revved the engine up manual using the throttle. Now it idles rough but runs great on the interstate. Not sure if it was coincidence or did he actually mess something up. It does have ASR. He took it to Mercedes and they said it was not showing any codes.

Any idea's?

 

2003 E 500 Automatic Climate Control will not chang over to heat. It only blows cold Air.

 

my mercedes s500 96 seems to start and run but idles very very rough like its miss fireing even more so when i put it into drive or a gear like its about to conk out it did it last time a few mounths back but i put it into a lower gear to get it home then it sprang into life and ran fine since now i left it for a while its done the same i dont want to go out and have it srping back into life on a roundabout again what can i do any ideas out there