Founding Member #2
Join Date: Jun 2006
Location: Orange County, CA
Vehicle: 2008 SLK 55
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It sounds like the initial rpm is still high when you put in on drive/reverse.
Here's what I habitually do: after starting the car in P, I do not shift the auto transmission to D or R right away. I watch the rpm (whilst enjoying the sound of the engine while SmartTop retracts the roof), it is around 1000rpm the first 30-60 seconds, and it will gradually decrease to around 700-750 rpm (now enjoying the low-pitch barble). I then step on the brake pedal, and move the gear into R (in my case), gradually release pressure on the brake pedal and the car reverses slowly, probably 1-2 mph.
If I let go (almost completely no pressure) of the brakes it will reverse at a higher rate of speed, like 5-7 mph, which is too fast for me. When the engine is warm (90-100 C), the car will move at a slower rate when the gear is engaged but then the idle rpm is close to 500-600.
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Pewter(cubanitsilber metallic)/Beige, PIII package, Airscarf, Hands-Free Communication System, Lighting package; Designo Black Leather Cover on e-brake handle(Thank you Bill T), SmartTop v3.x, John's 3BFM, M113 AMG OEM air filters, Modified R170 ant., clear side-markers & front parking lamps w/error-free LEDs, chromed front & rear turn indicator lamps, steel mesh at battery bay cover & cabin air intake, sock-over-seatbelt buckles, belt-loop guide protectors, Lamin-X fog lamp protectors, bilateral rear fog lamps enabled, AMG crest on gear shift knob
Last edited by etyu; 09-09-2008 at 10:17 PM.