Srs light sos light cruise control and speedtronic light on and LR visit workshop

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SRS is the "Supplementary Restraint System" and that refers to the air bags, not the seatbelts.

JAGUAR TYPE XTYPE 2001 2009 WORKSHOP SERVICE REPAIR MANUAL


I hope your problem will be solved :))

Whenever this warning light or any other stays on in the dash it is indicating that the systems control module (or the system sensor in the case of lights like low oil pressure, door open indicators etc.) has detected a fault, it then disables the system (this applies to ABS,TCS, TCM, SRS, TPMS and BCM faults and others) as long as the light is on. You must now have the dealer hook up a special electronic diagnostic tool and "scan" the system for the fault code that is stored for the problem(s)

Legend of Abbreviations. ABS Anti-lock brake system. TCS Traction control system, TCM Transmission control module, SRS Supplemental restraint system, BCM Body control module. TPMS Tire Pressure Monitor System

and i am thinking lack of ground to the dash and steering column, seems to explain more

Sounds like the Brake Safety switch. It is attatched to your brake pedal on the back, call your local Mercedes mechanic ask if they have one. Easy to replace and under 50 dollars.

I AM AN ASE VOLVO MASTER TECH AND WHAT YOU ARE DESCRIBING IS AN UNUSED CIRCUT AND THE PLUG PROBALLY FELL OUT BUT IMIGHT NEED MORE INFO

Most likely the clock spring assembly which the wires run through for airbag, cruise switches and horn button. Requires steering wheel removal to access part.

The flashing light should be giving you a code that will help determine the fault. It will be in morse code like 3 flashes then a short pause and 2 flashes.
However with your second concern that cruise control does not work I would have to say you most likely have a bad clock spring. This is a unit that mounts behind the steering wheel to make electrical contact with cruise switches and air bag.

the cruise control has an ECU(electrocic control unit) which enables the car to keep moving considering the load and speed and slops too...so i don't think it should get disturbed by the stereo.. but anyway if it was doing so then you did gud. while your buzzer doesn't work then get the electrical circuits checked and also check if while taking out stereo the sockets were loosened.. :)