MECEDES E320 Cdi 1999 Cruise Control Problem

MERECDES E320 CDi 1999 (UK)

Hi! Y'all. Thanks for your help so far.

My main problems seem to have been resolved with the change of the Air Mass Sensor.

From time to time still getting;

Code 130 CAN comms with control unit N15/5 (electronic selector lever module control unit) intermittent disturbance

and

Code :P1856-005 Selector lever position detection failed.

and

Code: P1664-002 Electric Heater Booster equipment fault

..... MB letting these ride for a while to check if they return.

The main thing I notice is that the cruise control backs off suddenly when at speeds over 55 mph .... it will set .... run for a while ... then suddenly back off .... resume and reset both get it back again .... but if you try this too many times it backs off totally and will not set .... until you switch of and start again.

Still the best car I have ever had ... when it goes it goes great!

Thanks again all/any ideas welcome.

You say it "backs off" - you mean it quits and needs to be reset or
falls back to some lower speed?

If it simply quits I'd suspect its circuit board has a cracked solder
connection. But check its fuse before doing anything with the CC unit.

There are CC rebuilders who know these components and can repair them.