Quote:
Originally posted by imaginasian
During a cold startup, there is a high whine (but not high rpm) for about 1 min as the engine warms up which has been with me since i bought it at 40K and I believe that is a normal thing.
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Yep. Part of the emission system. Perfectly normal. Also, when at op-temp, the engine might make a "tick-tick" noise that is also normal, due to some valve in the emissions system.
MB plug wires last quite a long time, but you could check/have them checked for proper resistance, as the car is close to eight years old now.
If you replace the plugs, don't fall into the Platinum Trap. Most MB engines don't use 'em, and run bad with 'em. Follow your owners manual.