I know that 500sel is a gas guzzler. I spoke with a guy who has s420 and he got 650 miles on full tank city/highway. I never push my cars but it seems to burn 9-10 mpg city/highway which I think is too low. And as Hatterasguy said its like s600 mpg. Also car smells gas and smokes out exhaust which also make me feel that there is a problem. If I can get 12mpg in city and 15 on highway its OK but Im not. I believe your car is in good shape so if my car burns way more than yours I have a problem. Thanks for reply now I have numbers to work with. Any ideas why my car burn so much fuel besides that I floor it every intersection? O2 sensor is new btw
Thank you
Victor

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1999 ML430 Silver 135k ml
Smoked LED taillights, Alpine in-dash DVD player, 12" sub, Pioneer components, 2 amps, 4200k HIDs, ML55 headlights, 20" rims, mirror LED blinkers

SOLD. 1996 E320 145k ml. Burgundy

SOLD but miss it everyday 1992 500sel Black
Chime buzzer mod,Alpine CD/MP3 player with stock amp,Euro headlights,S600 grill,20" rims, BEST CAR EVER!

SOLD. 1990 300E White
187k ml,smoked tails,Euro headlights,17rims,Intake,12" sub in first aid kit,alarm/autostart,buzzer mod