S600 1996 73,000kms

Cold Start
1. When I start the car (cold start) the engine idles smoothly and no ASR light.
2. After driving in the heat (in Saudi Arabia) the Car heats to 110c (approx).
3. Idle becomes rough
4. Shift is not smooth (jerky)
5. and ASR light may come on when driving goes into LH mode.

Hot Start
1. When I start the car after driving and the car is still hot (over 100c).
2. ASR light is off at start
3. Idle is rough
4. ASR light come on when accelerator is depressed car goes into LH mode.

Questions:
1.) Any idea of the likely cause(s) I can suggest at the shop with replacing the ETA as a last and expensive resort (shops here will start with the most expensive solution and work back).
2.) Will an ASR Defeat Switch work (where can I get one??)?
3.) Is that heat (110c) extreme or related to the power problem?

Any help would be greatly appreciated!

Cheers!

Daniel

I don't know if it's allowed to type in Arabic but I've seen not rule the prevents it.
أول شي شوف ضفيرة الدعسة وشيك على برمجتها عالكمبيوتر وشوف الكودات يلي بتطلع.

__________________
Master Computer Engineer, A+, Network+, MCP/MCSA/MCSE 4/2k/2k3 - Messaging, MCTS, MCITP, MCT, Brainbench, ICDL and starting Ph.D

380SE 1984 <------- Totaled by flipping accident
300SE 1988 <------- Sold
Volvo S70 2000 <---- 4 family
Opel Omega 2002 <-- 4 family
560SEC 1989 <------ Sold
560SEL 1990 <------ Sold
560SEL 1991 <------ 4 my mother
560SEL 1989 <------ Sold
600SEL 1992 <------ Current

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