Here is the datacard for that vehicle if you want to see what options it left the factory with.I see no mention of DPF.
Ident. number (FIN) WDB2093082F250362
VIN WDB2093082F250362
Baumuster 209308
Sales name CLK 220 CDI
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Checking VIN for Mercedes-Benz WDB2093082F250362 | CARInfo
Order number 0 7 537 74274
Delivery date 24 01 2008
PAINT1 359U TANZANITE BLUE METALLIC FINISH
Interior color 811A AMARETTA/LEATHER/NAPPA/SEMI-ANILINE - BLACK/ANTH.
Engine 646966 30 631703
Gearbox 722699 07 269189
General data for model code 209308
205B OWNERS MANUAL AND SERVICE RECORD - ENGLISH
249 INSIDE AND OUTSIDE MIRROR AUTOMATIC DIMMING
250B MOBILO LIFE/EUROPE SERVICE PACKAGE
265 LINES-NO.PLATE DISCONTINUED
283B AIRBAGLABLE - ENGLISH
335B INSTRUMENT CLUSTER LANGUAGE - BRITISH ENGLISH
354 ANTENNA FOR TELEPHONE D/E-NET
359U TANZANITE BLUE METALLIC FINISH
386 MOBILE PRE.-INSTALLATION (MTUS)
404 MULTI-CONTOUR SEAT, FRONT LEFT
405 MULTI-CONTOUR SEAT, FRONT RIGHT
423 5-SPEED AUTOMATIC TRANSMISSION
428 STEERING WHEEL SHIFT BUTTONS/GEARSHIFT PADDLES
461 INSTRUMENT WITH MILES IND. AND ENGLISH LEGEND
477 TIRE PRESSURE LOSS WARNER
486 SPORTS SUSPENSION
500 OUTSIDE REAR VIEW MIRROR LH AND RH FOLDING
523 RADIO AUDIO 20
551 ANTI-THEFT/ANTI-BREAK-IN WARNING SYSTEM
573 CHILD SEAT MOUNTING, ISOFIX IN REAR
580 AIR CONDITIONER
5XXL EUROPE
600 HEADLAMPS - CLEANING EQUIPMENT
613 HEADLAMP LEFT-HAND TRAFFIC
666 PRODUCT PROT.F.TRANSPORT VEH. W/O TIE-DOWN HOOKS
673 HIGH-CAPACITY BATTERY
690 EMERGENCY SPARE TIRE (MINI SPARE)
739 ALUMINUM TRIM PARTS
772 AMG STYLING PACKAGE-FRONT SPOILER, SIDE SKIRT
782 AMG-SPOKEN WEELS 18" MIXED TIRES
808 AEJ 07/1
808 *1 209____ 20050909 AEJ 07/1
808 *2 722.6__ 19960119 YOM 17/1
810A AMARETTA/LEATHER/NAPPA/SEMI-ANILINE
811A AMARETTA/LEATHER/NAPPA/SEMI-ANILINE - BLACK/ANTH.
819 CD CHANGER
873 SEAT HEATER FOR LEFT AND RIGHT FRONT SEATS
875 HEATED SCREEN WASH SYSTEM
882 INTERIOR SAFEGUARD
926 EXHAUST GAS CLEANING WITH EURO 4 TECHNOLOGY
950 AMG SPORTS PACKAGE
954 EQUIPMENT PACKAGE FOR AVANTGARDE VEHICLES
983 COC PAPER EURO 4 TECHNOLOGY W/O REG. CERT. PART II
989 IDENTIFICATION LABEL UNDER WINDSHIELD
K13 STEUERCODE FUER SERVICEINTERVALL 25000 KM
M002 ENGINES WITH EXH.TURBOCHARGER WITH INTERCOOLER
M22 DISPLACEMENT 2.2 LITER
M646 R4-DIESEL ENGINE OM646
NB0 NEW VEHICLE DOCUMENTS: DAIMLER AG
U18 AUTOMATIC CHILD SEAT RECOGNITATION (AKSE)