I'm thinking about buying a 2001 CL55. the car is in mint condition, starts/runs great but the throttle is completely broken. Engine only mildly revs when the peddle is to the floor. the code is P0120 which is the accelerator position sensor. The dealer seems to think that's all the problem is. What do you guys think? Anyone else experience a similar problem?

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Current Stable:
01 ML55 AMG
92 500E (a few mods)
87 300E (lots of mods)
00 Chevy 3500HD Diesel Box Truck
68 18' Donzi Marine
06 GT i-Drive7 1.0 Mountain Bike (with GPS!)

PREVIOUSLY OWNED:83 300SD, 87 420SEL, 88 420SEL, 90 420SEL, 86 560SEL, 86 190E 2.3-16V AMG, 94 E320