Mat Did you ever find a Cure ?
Ive been replacing parts for 2 months now.

1030pm update. took a flashlight and mirror and looked all around the firewall and found a 3/4" vacuum hose disconnected. Hooked it up , it seemed to idle smoother and the check engine light immediately was off. Tomorrows test drive will tell the story.

Steve

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Steve Danville
what i did myself.
CPS
rear shocks
MAS x 3.
SparkPlugs (twice)
Fuel pump & Filter
Window switch
replaced both failed horns with Honda horns.
Cleaned ERG Tube
Oil changes
Oil consumption Fix
Brake Pads
A/C Recharge
Anti-Freeze change X 2.
Front Shocks. Monroe. $90
Mercedes Warrenty Work:
Harmonic balancer,power steering clamp. Cat converters.Drive Shaft Bearing.s
Replaced Outer Lower Tie Rods and front lower ball joints at 156,000 miles